PURPOSE:To collectively solder plural terminals by making a terminal part have a square at its cross section shape and be twisted with a longitudinal direction as an axis to possess a solder retention function. CONSTITUTION:To make a terminal part 1a have a solder retention function, the cross section shape of a terminal part 1a is made a square and the terminal part is made to be twisted with a longitudinal direction as an axis. Moreover a spiral groove 1b is threadedly provided on the peripheral wall of the terminal part 1a. Consequently solder is buried within the groove 1b spirally twisted, therefore reliable soldering can be made by inserting the solder in the through hole 5a of a printed board 5. This permits the rationalization of the mounting process of a connector to the printed board 5.