An optical reproducing/recording apparatus (100) has a core (1), a frame (2), a top cover (4), a bottom cover (5), a drawer (3), a front panel (7) and anti-dust elements (61-65). The top and bottom covers, the frame, and the front panel engage each other to form an enclosure enclosing the core. At least one of the top and bottom covers has a plurality of position holes (431) by which the reproducing/recording apparatus is fixed in a computer. The anti-dust elements are attached to the at least one cover and drawer and cover the position holes and gaps.