A disk recording and/or reproducing apparatus includes a housing with a disk entrance and exit slot into and from which a disk is inserted and ejected, a gate on the housing so as to cover the disk entrance and exit slot, and a disk transport mechanism for transporting the disk to pass the disk entrance and exit slot. The gate member includes a gate cover closing the disk entrance and exit slot and which has a recess slot through which the disk passes. A mechanism is provided for changing resistance force of a recess slot peripheral edge portion that contacts the disk when the disk passes the recess slot in response to the direction in which the disk passes the recess slot.