To actualize a plurality of working modes depending on the thickness, shape, handling and the like of an object to be fixed by using one push pin.

A pair of first member 11A and second member 11B have abutting head portions 13 (13A, 13B) at the front ends of needle portions 12 (12A, 12B) is provided. A recessed portion 17 is provided in the head portion 13A of the first member 11A, and a protruded portion 18 to be detachably fitted to the recessed portion 17 is provided on the head portion 13B of the second member 11B. The head portions 13A, 13B of the first member 11A and the second member 11B are connected to each other via a joint material 21. The first member 11A and the second member 11B are separated from each other in use, or otherwise the head portions 13A, 13B of the first member 11A and the second member 11B are connected to each other with the protruded portion 18 fitted to the recessed portion 17 in use.