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Armbar BJJ

The armbar, known formally as juji-gatame (cross body arm lock), hyperextends the elbow joint by trapping the arm between your legs and bridging your hips. It is one of the most reliable submissions in BJJ, effective from closed guard, mount, and side control in both gi and no-gi.

Reviewed by CNX BJJ
Last updated: June 2026
Safety disclaimer: Practise these techniques under the supervision of a qualified instructor. Apply submissions slowly and with control. Tap early and tap often.

What Is the Armbar in BJJ?

The armbar is a joint lock that targets the elbow. You isolate one of your opponent's arms, trap it between your thighs, and bridge your hips upward while pulling their wrist down. This creates a hyperextension force at the elbow joint that produces a tap. The technique is called juji-gatame in Japanese, where juji means cross-shaped, describing how your legs cross over the opponent's body to control them.

In Brazilian Jiu-Jitsu the armbar is considered a foundational submission. It appears in virtually every guard position, from the attack triangle of guard (armbar, triangle choke, omoplata) through to mount, back control entries, and leg entanglement transitions. Unlike chokes, which require the opponent to go unconscious to end the match if they refuse to tap, the armbar produces immediate structural pressure, making it highly reliable under competition conditions.

The technique should not be confused with the Americana (ude-garami applied from top) or the kimura, both of which target the shoulder rather than the elbow. The armbar requires the arm to be straightened; a bent arm must be straightened before the lock can take effect, which is why wrist control and elbow alignment are critical to the setup.

Setup and Prerequisites

Before attempting the armbar you need two things: the opponent's posture broken forward so their weight is over you, and an isolated arm you can control at the wrist. From closed guard, your legs around the opponent's waist give you the tool to break their posture. From mount, your body weight already controls their torso, so the primary task is identifying which arm to attack and securing the wrist before they can react.

Good hip flexibility makes a significant difference to the guard armbar in particular. The pivot that swings your legs from a standard guard position to perpendicular with the opponent's arm relies on your ability to shift your hips sharply to the side. If you feel stiff during drilling, slow the pivot down and focus on getting your bottom hip off the mat before swinging the leg over.

You should already be comfortable maintaining closed guard and breaking posture before drilling the armbar. If you are new to guard, start with the closed guard fundamentals first. Similarly, understanding how submissions fit together as a system is covered in the submissions overview.

Step-by-Step Execution: Armbar from Closed Guard

  1. Control the wrist. From closed guard, grip your opponent's right wrist with your left hand using a firm C-grip. Pull it to your sternum and keep it there throughout the setup. Losing wrist control at any point allows them to pull their arm free.
  2. Break posture and position the arm. Use your guard and your free hand on the back of their head or collar to break their posture forward. Angle the trapped arm so it points straight down toward the mat, with the elbow directly over your hips.
  3. Pivot your hips to the right. Open your guard, push off your left foot, and shift your hips sharply to the right (toward the trapped arm). Your bottom hip should lift off the mat. Keep the wrist glued to your chest throughout this movement.
  4. Swing your right leg over their back. As your hips pivot, swing your right leg over the opponent's back and place the back of your knee against their shoulder blade. Do not cross your feet yet.
  5. Bring your left leg over their head. Swing your left leg up and over their head or neck. Your left leg should now be across the side of their face and neck, not across their throat.
  6. Squeeze your knees together. Clamp both knees inward to trap the arm securely. This is the most commonly skipped step and the most common reason the opponent pulls their arm free. There should be no daylight between your thighs.
  7. Align the elbow and rotate the arm. Confirm the opponent's thumb is pointing upward. The elbow joint should rest on your hip crease or inner thigh. Rotating their arm so the thumb points down reverses the mechanics of the lock.
  8. Bridge your hips to finish. Pull their wrist down toward your chest with both hands and drive your hips upward. Apply pressure gradually. The combination of the downward pull on the wrist and the upward drive of the hips creates the hyperextension force on the elbow.

Armbar from Mount

From mount, the setup is somewhat simpler because your body weight already pins the opponent. Identify the arm you wish to attack, typically the one the opponent extends to push on your hip or chest. Post one hand on the mat for balance, swing your outside leg up and over the opponent's head, and sit toward their shoulder while pulling their wrist to your chest. Lower yourself to the mat, squeeze your knees, and bridge your hips to apply the finish. The mount armbar is often a good choice for beginners because gravity assists the control and the opponent's movement options are more limited than from guard.

Common Mistakes

  • Not breaking posture first. If the opponent is sitting up tall in your guard, pivoting your hips is much harder and they can simply stand up. Always break posture before attacking. Pull their head or collar down, use your hips, and keep them bent forward.
  • Releasing the wrist during the pivot. Many practitioners grip the wrist, begin to pivot, and then transfer to a different grip mid-movement. The wrist must remain controlled at your chest throughout the entire pivot. Practice the pivot as a single connected motion.
  • Legs not squeezing together. Leaving a gap between your knees is the main reason opponents pull their arm out. After your legs land in position, the very next action should be to clamp your knees. Make this a habit every single repetition in drilling.
  • Elbow not on the hip crease. If the opponent's elbow is too high on your thigh or too far toward your stomach, the lever is off and the bridge will not produce clean pressure. Slide the arm down so the elbow sits precisely on the crease where your thigh meets your hip.
  • Thumb pointing down. The armbar only works cleanly when the opponent's arm is in a specific rotation: thumb up. If their arm is rotated so the thumb points toward the mat, the mechanics reverse and the submission loses most of its force. Check the thumb before you bridge.
  • Bridging before the position is set. Bridging prematurely, before the arm is aligned, the knees are squeezed, and the wrist is secured, rarely produces a tap and often alerts the opponent to escape. Settle the position first, then apply the finish.
  • Crossing the ankles over the throat. Placing your leg across the opponent's windpipe puts pressure on their airway rather than controlling their posture. The leg should cross the side of the neck and face, not the throat. This is also a foul under IBJJF rules.

Variations and Follow-Ups

The armbar sits at the centre of a web of connected attacks. Understanding its connections to other techniques makes your overall game significantly harder to defend.

Armbar from the triangle choke: If your opponent is defending a triangle choke by clasping their hands together, the arm you are already isolating for the triangle is perfectly positioned for an armbar. Pull the wrist across your centreline, open your triangle, and angle for the armbar finish.

Armbar to triangle choke: The reverse also works. If the opponent is posturing to defend your armbar from guard, their upright posture and the position of their free arm often create the angle needed to re-shoot a triangle choke. See our guide on the triangle choke for the setup from this position.

Omoplata entry: When the opponent stacks their weight forward to pass your guard while you have an armbar grip, swinging the bottom leg under and over creates an omoplata (shoulder lock) position. This is a natural pressure release when the armbar is stacked.

Armbar from the back: From back control, if the opponent turns into you to escape, their top arm often becomes isolatable for a straight armbar. You fall back to the mat with the arm trapped between your legs, applying the finish from a slightly different angle to the standard guard armbar.

Belly-down armbar: Also called the over-the-shoulder armbar, this variation is applied when the opponent is face-down and you are on top. One leg traps the arm, you apply a figure-four or wrist control, and the pressure comes from rotating the arm upward against the direction it naturally bends. This variation is seen more frequently in no-gi submission wrestling and ADCC competition.

Spinning armbar from guard: An advanced entry in which you grip the wrist and spin your entire body 180 degrees underneath the opponent rather than pivoting sideways. This can be more explosive but requires considerable drilling to develop reliable timing.

Competition Context

Under IBJJF rules, the straight armbar (juji-gatame) is legal at all belt levels and in all age divisions, for both gi and no-gi competitions. A successful armbar ends the match immediately with a submission victory. The IBJJF Technical Submission rule means that if a submission is locked in during or just after the final buzzer, the referee may award the submission to the attacking competitor.

It is worth noting that under IBJJF rules, flying armbars (where you jump to secure the position without first being grounded) are prohibited. You must already be in contact with the mat or the opponent before executing the technique. Executing a flying armbar will result in a disqualification.

Under ADCC rules, which govern many of the most prestigious no-gi submission grappling events, the straight armbar is fully legal from the start of the match. ADCC's submission-only emphasis means that the armbar is one of the most frequently attempted and finished techniques at elite level, alongside heel hooks and rear naked chokes.

For practitioners competing in Thailand under local BJJ federation rules, check which ruleset applies to your specific event. Many local Thai competitions follow IBJJF scoring and submission rules, but this should always be confirmed with the event organisers directly.

Drilling Suggestions

Begin every drilling session on the armbar with a solo movement drill: lie on your back, grip an imaginary wrist, and practice the hip pivot and leg swing without a partner. Ten slow repetitions per side, focusing on getting the bottom hip fully off the mat during the pivot, builds the muscle memory faster than immediately going to partner drilling with resistance.

With a cooperative partner, drill 10 to 15 repetitions per side at roughly 20 to 30 percent speed. The partner stays passive, allowing you to find the position. Focus on the sequence: wrist to chest, pivot, leg over back, leg over head, knees squeeze, thumb check, bridge. Each step is a checkpoint. Once the steps feel automatic, ask your partner to provide light posture resistance so you practise breaking their posture before pivoting.

Progress to positional sparring starting from closed guard. Set a rule: the bottom player may only attack the armbar, triangle choke, or omoplata. The top player defends and tries to pass. Rotate every 3 minutes. This builds the armbar into your live game rather than keeping it isolated as a drilling movement.

For the mount armbar specifically, begin rounds from mount and attack only the armbar or mounted triangle. Switching between the two keeps the opponent guessing and forces you to read which submission is available in real time.

Frequently Asked Questions

Juji-gatame is the Japanese term for the armbar. Juji means cross or cross-shaped, referring to the position of the attacker's legs over the defender's body. Gatame means hold or lock. In BJJ, the technique is commonly called simply "the armbar", but knowing the Portuguese term braço (arm) and the Japanese root helps in a multilingual training environment.
Yes. Under IBJJF rules, the straight armbar (juji-gatame) is legal at all belt levels, including white belt, in both the gi and no-gi divisions. It is classified as an elbow lock and earns an immediate submission victory when successfully applied.
From closed guard you are on the bottom and must pivot your hips sideways and swing your legs up to trap the arm. From mount you are already on top and can choose to swing one leg over the opponent's head, fall to the side, and secure the arm. The mount armbar is generally considered easier to control because you have gravity working with you. Both share the same finish: elbow on the hip crease, thumb up, hips bridging to hyperextend the joint.
The most common cause is failing to squeeze your knees together after your legs are in position. If there is a gap between your thighs, the opponent can pull their elbow back through. Focus on clamping your knees tightly and holding the wrist firmly against your chest before bridging your hips.
In Brazilian Portuguese the armbar is sometimes called chave de braco, meaning arm key or arm lock. The Japanese term juji-gatame is, however, widely used across BJJ academies worldwide, including in Brazil and Thailand.
The primary defence is to keep your posture upright and your elbows close to your body so your opponent cannot isolate one arm. If they begin to pivot and swing a leg over your back, pull your elbow free early before they can lock their knees together. Gripping your hands together (the Gable grip or S-grip) can buy you time, but it is a temporary measure. The best defence is positional awareness before the grip is established.
Yes. The armbar is one of the most commonly used submissions in no-gi BJJ and submission wrestling. Without a gi collar to hold posture, the opponent may actually be easier to break forward, though the lack of friction can make the pivot and leg swing slightly faster to execute cleanly. Under ADCC rules, the straight armbar is legal for all competitors.
A successful armbar earns an immediate submission victory under IBJJF rules, ending the match. No points are awarded for the technique itself, as the submission is the highest possible outcome. If the armbar attempt from guard results in the bottom player coming on top, that positional change may score 2 points for a sweep.
The armbar chains naturally with the triangle choke and the omoplata from guard, forming a classic attack triangle. If your opponent postures to defend the armbar, the triangle choke becomes available. If they stack to pass your guard while you have the armbar grip, transitioning to an omoplata is effective. From mount, the armbar connects with the rear naked choke and the mounted triangle.
A useful starting point is 10 to 15 slow repetitions per side focusing on mechanics, followed by 5 to 10 reps at a faster pace with a cooperative partner. Once the movement feels automatic, progress to positional sparring where one partner attacks the armbar from guard and the other defends for timed rounds of 3 to 5 minutes. Quality and hip mobility take priority over repetition count.
Applied too quickly or without control, the armbar can hyperextend the elbow beyond its safe range, causing ligament damage or, in extreme cases, a fracture. Always apply the finishing pressure gradually in training. Tap early if you feel the technique being locked in, rather than waiting until there is pain. Practise under the supervision of a qualified instructor, particularly when first learning the submission.