To provide a press-fit pin fixed to a substrate with a stable condition, compared with conventional one.

A left thick wall part 15 wherein the front F1 of a contact portion with an inner peripheral surface of a through hole 31 is positioned in a front side of a front face 13a of a left overhang part 13, and wherein the rear B1 of the contact portion is positioned in a rear side of a rear face 13b of the left overhang part 13 is provided in at least one portion of the contact portion contacting the inner peripheral surface of the through hole 31 in the left overhang part 13, and a right thick wall part 16 wherein the front F2 of a contact portion with an inner peripheral surface of the through hole 31 is positioned in a front side of a front face 14a of a right overhang part 14, and wherein the rear B2 of the contact portion is positioned in a rear side of a rear face 14b of the right overhang part 14 is provided in at least one portion of the contact portion contacting the inner peripheral surface of the through hole 31 in the left overhang part 14.