According to one embodiment of the invention, a disk drive apparatus includes a case, a disk-shaped recording medium, a drive motor, a head, a head actuator, and a latch mechanism configured to latch the head actuator and hold the head actuator at a retracted position when the head actuator receives an external force. A latch member of the latch mechanism is arranged to be movable between a latch position and a release position and has an abutment portion, which abuts the head actuator when the head actuator moves from the information processing position to the retracted position, and a latch claw which latches the head actuator. The abutment portion has a first abutment portion, which abuts the head actuator first, and a second abutment portion, which abuts the head actuator following the first abutment portion, and the first abutment portion being formed less rigid than the second abutment portion.