A connector includes a ground pin and a signal pin. The ground pin includes a first cylindrical part, a first cylindrical terminal telescopically movable into the first cylindrical part, and a first elastic member compressible in a first central axis direction. The signal pin includes a second cylindrical part, a second cylindrical terminal telescopically movable into the second cylindrical part, and a second elastic member compressible in a second central axis direction. The signal pin is provided concentrically with the first elastic member and the first cylindrical part, and has a one-piece structure of a single metal plate. The first and the second cylindrical parts are connected to a ground line and a signal line of a board with the first and second cylindrical terminals being in contact with the board and compressed in the first and second central axis directions, respectively.