Inspection Socket

An inspection socket comprising:

• a contact terminal that includes:
• a barrel that consists of a tube body extending in an axial direction and has a flange section where a part, extending in the axial direction, of the outer periphery of the tube body radially protrudes, a device-side terminal provided at one end of the barrel, and a board-side terminal provided at the other end of the barrel;
• metal housings each of which has a through hole into which the contact terminal is inserted in the axial direction, the through hole has a larger inner diameter than at least the flange section of the barrel;
• and
• a resin alignment board that has a positioning hole into which the contact terminal is inserted in the axial direction, an inner diameter of the positioning hole being larger than an outer diameter of the contact terminal excluding the flange section and smaller than an outer diameter of the flange section, wherein
• the metal housings are disposed, at least, on the board-side terminal side and the device-side terminal side and between the board-side terminal and the device-side terminal,
• the alignment board is sandwiched between the metal housings,
• the flange section is contained in the through hole formed in the metal housing on the board-side terminal side, and
• the through hole is designed to have, for impedance matching, a gap from the outer periphery of the contact terminal.