the first movable plate u201c a 2 u201d and the second movable plate u201c b 2 u201d are electrically connected with one of the first and the second drive wires for supplying electric power to the synchronous motor 37 through the fourth terminal u201c t 4 u201d on the other hand connecting second terminal u201c t 2 u201d disposed in the connector part 44 b is connected with the other of the first and the second drive wires for supplying electric power to the synchronous motor 37 and is connected with a power supply for driving the synchronous motor 37 fig1 a and 10b are explanatory views showing drive embodiments of the clutch device 10 fig1 a shows a first drive embodiment in which the first and the second switches u201c a u201d and u201c b u201d are provided in a power feeding circuit u201c c u201d to the synchronous motor 37 fig1 b shows a second drive embodiment in which signals from the first and the second switches u201c a u201d and u201c b u201d are outputted to the outside of the clutch device 10 the power feeding circuit u201c c u201d includes the synchronous motor 37 a power supply for driving the synchronous motor 37 and a switch for switching on and off the power supply to the synchronous motor 37 in the embodiment in fig1 a the power feeding circuit u201c c u201d includes a first power feeding circuit u201c c 1 u201d.