To provide an antitheft belt having an antitheft effect for a defenseless handbag without a handle to lead to be readily stolen, by fixing and protecting the same with a plastic belt, a cloth belt, or the like.

A single ring is formed on one end of the plastic belt, the cloth belt or the like. A wrist, an arm, a palm, the back of the hand and the like are put into the ring. The ring is slidden and fixed. The other end of the belt is wound on a round of the handbag without the handle and is slidden, retained and fixed by a detachable buckle and a fixture to protect the handbag. A detachment stopping gear is provided for preventing detachment of the detachable buckle by a single touch.