In a printer having a housing forming a substantially box shape; a pair of frames disposed in the housing and arranged such that the frames oppose each other across a conveyance path of a recording medium; a cutout portion disposed at an upper end of each of the frames; and a shaft that while inserted inside a winding core on which long paper is wound into a roll shape, both ends of the shaft are supported by the cutout portions and the shaft holds the paper while allowing the paper to be pulled out from the housing; an exterior cover is disposed in the housing. The exterior cover is formed using an insulating material, has openings that open the cutout portions exteriorly, and covers the pair of the frames with the cutout portions opened exteriorly through the openings.