It is an object of the present invention to provide a convenient groin protector for combat sports capable of reliably preventing the position of the plate-like rigid body of the groin protector body from being deviated during a match, and capable of wearing and taking off the groin protector in a short time. The groin protector comprises, for wearing the protector body, a waist belt made of inelastic band-like member which is attached such that the plate-like rigid body 1 is suspended and which is wound around and attached to a hip of the player M, and a surface fastener type belt retaining mechanism 3 which retains so that the waist belt 2 is not loosened in a state in which the waist belt 2 is wound around the hip of the player M and fastened.