To directly mount and hold a coin type battery on a printed circuit board, and ensure a proper electrical connection between the coin type battery and the printed circuit board.

When a coin type battery 160 is coupled to space between the two first contactors 222 and 222 of a positive terminal 220 laid like an expanded stride, and a battery guide 190, the peripheral side of the coin type battery 160 as part of a positive electrode is clamped with the first contactors 222 and 222 and the battery guide 190. At the same time, the coin type battery 160 is held with a negative terminal contactor 215 for pressing the negative electrode side 163 thereof, and the second contactor 223 of a positive terminal for engaging the positive electrode surface 162 thereof.