A cassette deck which can be easily miniaturized while being capable of being manufactured at a reduced cost. The cassette deck includes a head stand reciprocably mounted to be able to move in a direction perpendicular to the tape running direction. A magnetic head is mounted on the head stand and is rotatable between two positions about an axis parallel to the direction of movement of the head stand. A tape-running-direction switching unit selects the tape running direction according to the angular position of the head. A head stand driving mechanism is provided including a first gear rotated to reciprocate the head stand. A head rotating mechanism includes a second gear which when rotated rotates the magnetic head. Torque is applied to the first and second gears from a single drive source.