A tray ejection apparatus for a disk drive which comprises a casing, a tray adapted to be movable into and out of said casing, a lead screw mounted for rotation on said tray, a pickup unit operatively engaged with said lead screw, driving means operatively connected to said lead screw for rotating said lead screw which in turn moves the pickup unit back and forth along said lead screw, a tray stopper extending from the casing, an ejection lever rotationally installed at the tray and in biased engagement with said tray stopper, and an ejection gear operatively engaged with said lead screw for rotation therewith, wherein upon the inputting of an ejection signal, the advance of the pickup unit is discontinued whereby the ejection gear engages the ejection lever, freeing it from the tray stopper and releasing the tray from the casing.