To decide the operation state of a camera and to release the locking of a double-winding preventing mechanism under arbitrary conditions by providing a double-winding prevention releasing means for electrically releasing double- winding preventing action.

While energizing a winding lock releasing coil 703C, an armature 703A projects from the inside of the coil 703C, and 1st and 2nd winding locking levers 701 and 702 are rotated to a double-winding prevention releasing position. The cases that the locking of winding is released include following. That is, it is released while a back cover is opened, when a winding lever 15 is restored to a preliminary angle range from a winding terminal, until film is fed by a prescribed amount during heading of the film, when the traveling of a shutter rear curtain is completed and the lever 15 is operated and rotated to wind the film by an amount equivalent to one tooth and the turning-on of a winding completion switch SWE is detected after shutter release at shutter release, and after finishing the shutter release for a final photographic frame and during film take-up operation after that.