A disc device which can ensure an effective area of a printed board is provided by having an operation range of an operation pin for disc detection within a position which does not cause trouble to the printed board. The disc device is characterized in that a chassis exterior is composed of a base main body (10) and a cover, a lever (110) which moves by insertion of a disc is provided on the rear side of the base main body (10), a rear base (13) is provided at a position not overlapping a traverse (30) but covering the printed board (14), an operation pin (114) is provided on a lower plane of a lever, a disc insertion detecting switch (115) is arranged close to the rear side of the printed board (14), and an operation range of the operation pin (114) is within a position closer to the rear plane than a turn supporting point (111) of the lever (100). |