A power line retaining member that houses, in a groove, a power line for connecting two separate components of an image forming device, the power line being a bare metal wire that has elasticity. The power line retaining member includes a guide and a restricting portion. The guide includes two side walls, internal wall surfaces of the two side walls and a bottom surface between the internal wall surfaces being electrically insulative and defining the groove, the guide holding the power line in an elastically deformed shape. The restricting portion is disposed on an internal wall surface that the power line exerts a restoring force against, the restricting portion restricting movement of the power line in a direction away from the bottom surface.