A belt fastener for detachably connecting two belt ends has a housing and a plug, which can be clipped into the housing. The belt fastener can be a safety fastener opening if a predetermined tensile load acts on the belt ends. A separate finger flap is hinged to a front end of the plug for clipping it into the housing. The finger flap preloaded outwards in direction away from the plug by a separate spring. The finger flap can be brought in abutment with a stop surface of the housing by means of a stop surface opposite of the attachment point. Both stop surfaces are tilted forward by an angle of inclination (α) of >0°, particularly of 20°. In addition, two stop surfaces can be convexly or concavely curved.
