Airbag with attachment for a gas generator

An airbag comprising a rear-side inflation opening, two mutually opposing side walls, a lower wall and an upper wall which abut an inflation opening, and a front wall facing an occupant, wherein in regions of the side walls, the lower wall and the upper wall adjacent to the inflation opening the airbag is formed of sections of a one-part cut fabric, and in the regions adjacent to the inflation opening at least the upper wall or the lower wall is formed by two sections of the cut fabric that are connected to each other along a connection emanating from the inflation opening, the cut fabric is cut and folded such that either only the upper wall or only the lower wall is formed from two sections of the one-part cut fabric and starting from the inflation opening only a first connection connecting the two sections of the one-part cut fabric extends toward the front wall, wherein in the regions of the inflation opening the one-part cut-fabric additionally forms with at least one fitting section for a gas generator, wherein in a flatly extended state of the cut fabric the at least one fitting section is disposed adjacent to the two sections of the cut fabric forming either the lower wall or the upper wall in the regions adjacent to the inflation opening.