A socket for an electrical part of the present invention has a socket body provided with an accommodation portion in which an IC package is accommodated, an open/close mechanism having a heat sink for performing radiation of heat of the IC package accommodated on the socket body, and a latch member for pressing the IC package accommodated on the socket body, in which opening and closing timings of the open/close mechanism and the latch member are set such that the latch member is first closed and the open/close mechanism is thereafter closed.