To provide a revolutionary friction brassiere made of a polyurethane foam material, prevented from slipping off due to friction with the inside of a wear even without straps and sticking to the skin, easily wearable, having excellent feeling of wear, reduced in production cost, causing no pressure of straps at all, completely free from lowering dressing well caused by external exposure of straps, facilitating looking the bust bountiful by giving volume feeling to the brassiere, extremely lightweight, permanently usable and easily washable.

This friction brassiere without straps is formed by foaming polyurethane followed by molding. The brassiere includes brassiere cups 300 swelling outside and denting roundly inside. Any brassiere strap is not formed on the brassiere cup 300. The position movement of the brassiere cup 300 is prevented by friction between the surface of the brassiere cup 300 and the inner surface of a wear 302, and a brassiere is fixed to a breast part and worn only through putting the brassiere cup 300 on the breast part.