b provided in the lower portion of the optical disk transfer means 6 or the door 19 and the grooves 2 b of the chassis 2 with which the door shaft 19 b is engaged and guided during this operation during the operation of fig3 b u2192 3 c the motor 7 shown in fig1 rotates and the disk holder 6 which is disposed in a position parallel to the front surface of the door 19 is moved from position a to position b in fig1 as a result the disk 3 held in the disk holder 6 is transferred in a state in which the disk 3 is inclined toward the front of the main body and is removed from the upper position of the main body 1 as shown in fig1 when the disk 3 is inserted into the reproducing apparatus and reproduced an operation that is the opposite from the operation described above is performed in fig4 the door 19 the optical disk insertion means 34 includes an optical disk transfer means 35 the disk holder 6 and a disk insertion port 30 when an optical disk 3 is inserted into the optical disk insertion means 34 that is the door 19 from the disk insertion port 30 or when an optical disk 3 is removed from the disk insertion port 30 it is not necessary to put fingers 32 of hand 31 of the user gripping the optical disk 3 into the open space 33 unlike the case to put a cassette tape into a cassette tape.