- "The Right Arm – if they're really against WCKD, maybe they can help us."
- — Thomas, Maze Runner: The Scorch Trials
The Right Arm is an organization opposed to WICKED. Their leader is Vince. They believe that the money that WICKED has been using in their search for a cure to the Flare would have been better spent in preventing the disease being spread across the planet, keeping more people healthy. The Right Arm has members in every remaining city.
Thomas, Minho, Brenda, and Jorge get a note from Gally shortly after arriving in Denver in The Death Cure. They visit him and he informs them that he is working with the Right Arm. They are kidnapped upon arriving back from the Crank Palace a few days later. They force the captives to take them to the leader of the Right Arm, for they discover it was they who kidnapped them. They meet Vince, who explains that they have been selling Immunes to WICKED so that when the time comes they can launch an attack. They send Thomas to WICKED so that he can plant a device in the WICKED HQ, allowing the Right Arm to attack while no one is able to use weapons. However, Thomas realizes that they are planning to blow up the headquarters rather than just take over it, so he convinces the others to leave them and help evacuate the Immunes trapped inside.
In the Scorch Trials film, The Right Arm is portrayed quite differently. Rather than having a base in Denver, the group is surviving out in the wilds of the Scorch. Brenda, Jorge, Sonya, and Harriet are also members. Thomas and the other remaining Gladers meet the group, but WCKD finds them due to Teresa's betrayal and raids their camp that night. A battle ensues, and Minho, Aris, and Sonya end up being captured by WCKD. The film ends with Thomas and the others recovering from the battle and figuring out a plan of attack against WCKD.