A recording medium driving apparatus can adjust the position of a linear driving
means with respect to a turntable with high precision, so that a direction in which
the head apparatus is moved by the linear driving means matches a predetermined
radial direction with respect to a rotational center axis of the turntable. The
recording medium driving apparatus includes a chassis 70, a rotating plate
63 that is rotatably provided on the chassis 70, a rotational center
determining means 61 that determines the rotational center of the rotating
plate 63 with respect to the chassis 70, and a rotational driving
means 62 for rotating the rotating plate 63 around the rotational
center. At least part of the linear driving means is fixed on the rotating plate
63 and the rotation of the rotating plate 63 by the rotational driving
means 62 adjusts the direction in which the head apparatus 22 is
moved by the linear driving means so as to match a predetermined radial direction
with respect to a rotational center axis of the turntable 26.
