A buckle includes separable cooperating receptacle and clasp members. The receptacle member includes a pair of locking slots formed in opposing sides thereof. The clasp member includes a pair of resilient arms having locking tabs thereon for releasably engaging the locking slots of the receptacle member. The receptacle member also includes a pair of grooves for slidably engaging cooperating raised ridges formed on a central arm of the clasp member for guiding said clasp member during insertion into and removal from the receptacle member. The central arm of the clasp member also includes a pair of laterally extending edges for defining a limit to the inward bending of the resilient arms. The receptacle also includes a belt end termination member including a slide member for adjusting the length of a belt looped around said slide member. The clasp member also includes a base member joining the three arms thereof and including a through slot for terminating a belt end or the like.