Providing an electrical component socket that enables stability of an electric resistance value to be maintained even after repeated use. A contact pin of the present invention includes: a lower contact portion; a spring portion that is provided so as to extend upward from the lower contact portion; a linear portion provided so as to extend upward from an upper end of the spring portion; and an upper contact portion that is formed on an upper end side of the linear portion. The upper contact portion includes a first contact protrusion arranged on an extension of the linear portion and a plurality of second contact protrusions arranged at respective positions off the extension of the linear portion.