An optical disk apparatus has a plurality of detection switches for improving safety while a mounting area is prevented from being occupied by the detection switches. A cabinet member accommodates component parts of the optical disk apparatus including a circuit board having control circuits that control various functions of the optical disk apparatus. A drawer member is movable between an accommodated position where the drawer member is accommodated in the cabinet member and a non-accommodated position where the drawer member is out of the cabinet member. An optical pickup is mounted on the drawer member so as to emit the laser beam toward the optical disk placed on the placement part. A plurality of drawer member detection switches are provided to detect a position of the drawer member. The drawer member detection switches are arranged on opposite sides of the circuit board in a state where the drawer member detection switches face each other with the circuit board located therebetween.

 
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