A socket for an electrical part adapted to be electrically connected to a terminal of an electrical part, comprises: a socket body; upper and lower contact pins mounted to the socket body so as to be contacted to or separated from the terminal of the electrical part, the upper contact pin being formed with an upper elastic piece having an upper contact portion contacting an upper surface of the terminal and the lower contact pin being formed with a lower elastic piece having a lower contact portion contacting a lower surface of the terminal; and an operation member disposed to the socket body to be vertically reciprocally movable with respect to the socket body, in which when the operation member is reciprocally moved, the upper elastic piece is elastically deformed to thereby displace the upper contact portion so as to be contacted to or separated from the upper surface of the terminal. In this structure, when the upper contact portion is contacted to the upper surface of the terminal of the electrical part so as to clamp the terminal between the upper and lower contact portions, the lower elastic piece is elastically deformed by an elastic force of the upper elastic piece to thereby displace the lower contact portion so that the terminal of the electrical part and the lower contact portion are slidably moved.