Recorder/reproducer

A recording/reproducing apparatus comprising:

• a chassis on which an optical pickup and a disc rotation driving part are provided;
• a cartridge holder in which a disc cartridge, in which a magneto-optical disc that can be recorded or reproduced is enclosed in a rotatable state, is inserted and which holds the disc cartridge, the cartridge holder being attached to the chassis so as to be able to rotate between a loading position at which the magneto-optical disc inside the held disc cartridge is chucked onto the disc rotation driving part, and an eject position at which the disc cartridge is ejected;
• a magnetic head that is disposed so as to face the optical pickup on an upper surface side of the cartridge holder and is moved via an opening between a lowered position inserted into the disc cartridge and close to the magneto-optical disc and a raised position away from the magneto-optical disc;
• at least one moving member provided so as to be free to move on the cartridge holder at a side part parallel with a direction in which the disc cartridge is inserted into the cartridge holder;
• a head raising/lowering mechanism that moves the magnetic head between the raised position and the lowered position by moving the at least one moving member in the direction of insertion of the disc cartridge;
• and
• a moving mechanism that is disposed on a lower surface side of the chassis, engages the at least one moving member, and moves the at least one moving member.