An airbag jacket having a good fitting performance of an expanded airbag for a body in the airbag jacket where the airbag is expanded along an outer surface of the body of the wearer. An airbag 2 is provided in a manner so as to cover a waistline and both shoulders of the wearer. An inside of the airbag 2 is partitioned into a plurality of cells 2a by means of that an inner panel 3 constituting a first surface on a wearer side of the airbag 2 and an outer panel 4 constituting a second surface on an opposite side to the wearer is partially stitched by means of a line-shaped stitching portion 6. Each of the cells 2a is formed to have a shape extending in a body height direction of the wearer. Thereby, the airbag 2 is brought to be expanded along an outer surface of a body portion of the wearer as a whole.