A tool receptacle is disclosed. The tool receptacle has a receiving sleeve which has a prismatic or cylindrical cavity for receiving a tool and an elongated hole for receiving a locking body. The elongated hole has a closed edge formed of two opposing longitudinal sides at a constant distance and two end sides completing the elongated hole. An extension along the working axis of at least one of the end sides is less than half of the constant distance of the opposing longitudinal sides. A groove running parallel to the working axis is provided on an inner surface of the receptacle sleeve. The groove is disposed in an extending manner at the elongated hole on the inner surface along the working axis.