Patent ID: 8882424

Claim:
A screw fall preventing structure for preventing a screw from falling out of a unit that is attachable to and removable from a main body of an apparatus, the screw being for fastening the unit to the main body of the apparatus, the screw fall preventing structure comprising: a wire piece having a bent portion fitted around the screw to hold the screw to be freely rotatable about its axis; and one fixing member fixing the wire piece to the unit, wherein when the unit is not fastened by the screw, the screw is elastically supported via the wire piece by the one fixing member, the elasticity given by a portion of the wire between a portion fixed by the one fixing member and the bent portion, and both ends of the wire piece are located at a position for fixing by the one fixing member, and the one fixing member fixes the ends of the wire piece to the unit in a manner that the ends of the wire piece are not exposed.