An optical disc changer includes a main body, a tray installed in the main
body to be capable of sliding, a roulette rotatably installed at the tray
and where a plurality of optical discs are accommodated, an optical pickup
device to selectively reproduce one of the optical discs accommodated on
the roulette, a drive gear member installed at the main body, rotated by
being connected to a drive unit, and selectively engaged with a rack gear
member formed on the bottom surface of the tray, and a tray gear unit
installed adjacent to the drive gear member and having a tray gears
selectively engaged with the rack gear member and the drive gear member.
