An actuator of a disk drive to move a read/write head for recording and reproducing data to a predetermined position on a disk, the actuator includes a swing arm rotatably installed inside the disk drive, a suspension coupled with a leading end portion of the swing arm and supporting a slider on which the head is mounted, and an absorption filter attached with one side of the swing arm to confront an airflow in a predetermined direction according to rotation of the disk, and to absorb foreign materials in the airflow.