To provide a method to a remove a pierced rivet mounted to a tubular and axis symmetrical object to be worked and an apparatus therefor.

A punched piece left in a pierced rivet when mounting the pierced rivet is removed by a tool, further, a mandrel with thread is screwed into the pieced rivet while forming a substantially continuous another screw thread. Successively the mandrel is pulled against a pressing force of a receiving base placed on the tool, the pieced rivet is pulled out from the work by the mandrel with the thread.