A disc drive comprises a housing provided with an opening; a disc loading device for loading a disc into or ejecting the disc out of the housing via the opening by means of rotation; a base seat movably installed in the housing in which a spindle motor and a pickup unit module are installed; and a joint mechanism installed in the housing for driving the base seat from a lower position to a higher position to support said disc on the spindle motor. Whereby, when the disc loading device is rotated out of the opening, the joint mechanism drives the base seat to the lower position; and when the disc loading device is rotated into the opening, the joint mechanism drives the base seat to the higher position meanwhile the spindle motor is raised to support the disc.