A flexible disk drive comprises a main frame, a magnetic head, a head
assembly supporting the magnetic head so as to move the magnetic head in
a tracking direction, and a guide rod fixedly attached onto the main
frame by a metal fitting to guide the head assembly in the tracking
direction. The main frame is made of a sheet metal and is provided with a
recessed portion having a sidewall. The sidewall is faced to an end face
of the guide rod with a small space left therebetween so that the
recessed portion restricts the movement of the guide rod in the tracking
direction.