The ZGMF-X09A Justice Gundam is a mobile suit featured in Mobile Suit Gundam SEED, piloted by Athrun Zala.

One of ZAFT's five ZGMF-X Gundam units produced in CE 71 using technology derived from the four captured Alliance's Gundam, the Justice Gundam has Phase Shift Armor and its armament consists of beam sabers, beam rifle, shield, beam boomerangs and head-mounted CIWS guns. The suit's main feature is the Fatum-00 unit on its back; this complex armament unit normally serves as the main thrusters, granting overwhelming acceleration and mobility when deployed horizontally and this configuration is also known as 'High-Mobility Aerial Tactics (HiMAT) Mode'.^[1] The Fatum-00 also grant flight capabilities in the atmosphere, and can be deployed as a separate unmanned unit or a subflight unit. It is armed with beam cannons and machine guns. In comparison to the other ZGMF-X Gundam units, the Justice's armament is relatively simple and pales in firepower compared to its sibling, the ZGMF-X10A Freedom Gundam.^[1] However, the Justice's true value lies in its incredible mobility and the various tactics it can employ using the Fatum-00.^[1]

Justice also has a tall sensor spine on the top of its head, similar to that of the GAT-X303 Aegis, and this enhances its ability to collect information in the battlefield. It can dock with a support unit, the METEOR unit, for heavier firepower and greater speed, and has an advanced targeting system, the Multi Lock-On System, which allows it to fire at multiple enemy units simultaneously. The Justice Gundam is designed to be operated alongside the Freedom Gundam and for this purpose, the warship Eternal is designed specifically to maintain both suits. Like the four other ZGMF-X Gundam units, Justice is equipped with Neutron Jammer Canceller and powered by a nuclear reactor, giving it virtually unlimited combat endurance.