an electromagnetic drive device of an electromagnetically operated shutter has a permanent magnet which is of a square shape and is magnetized into a multipolar state ; a rotation shaft disposed in parallel relationship with magnetic flux produced by the permanent magnet ; and a hexagonal coil having an electric current supplied thereto and opposed to the permanent magnet in such a way as to perpendicularly intersect the magnetic flux of the permanent magnet . the hexagonal coil part at which the current is to be supplied and which produces a force in the reverse rotating direction of the hexagonal coil , when the current is supplied , is located outside of the plane of mangetic flux .