The helmet according to an embodiment of the present invention includes a helmet body; a pad coupled to the inside of the helmet body, and a coupling member that separably couples the helmet body and the pad, wherein the coupling member may include a male coupling member disposed in one of either the inside of the helmet body or the pad, and a female coupling member disposed in the other of either the inside of the helmet body or the pad and into which the male coupling member is inserted and fixed, wherein the male coupling member has a first inclined surface at a portion inserted and fixed into the female coupling member, and the female coupling member has a second inclined surface corresponding to the first inclined surface, and when an external force is applied to the pad in a first direction so that the male coupling member is separated from the female coupling member in a state in which the male coupling member and the female coupling member are coupled, the first inclined surface moves along the second inclined surface, and the pad is separated from the helmet body.