Press-fit terminal and electronic device

A press-fit terminal is configured to exert a reaction force through elastic deformation on a through-hole and to be supported by the board, and includes two beams to be opposite to each other and to be elastically deformable. The two beams respectively have counter surfaces facing to each other. Each beam includes: a base material with a main surface and a side surface having one or more rounded corners formed in a curved surface with a contact zone in contact with the wall surface of the through-hole; and a plated film having a main portion on the main surface and an extension portion having an average thickness smaller than an average thickness of the main portion. The two beams have two or more of the rounded corners in total, and at least one of the rounded corners are provided with the extension portion.