A mounting device (10) for a folded airbag, especially for a folded side airbag, is provided comprising a base plate (12), a clamping portion (14) encompassing the airbag in ring shape and a fixing plate (16) adjacent to the clamping portion (14). The fixing plate (16) and the base plate (12) exhibit a first and, resp., a second contact surface (32, 34) which are directly superimposed in the mounted condition. Furthermore an airbag module comprising a mounting device (10) is suggested.