To provide a car disk drive unit operating in a stable condition which is hardly
affected by temperature changes in a vehicle, a car disk drive unit 1 of
the present invention comprises: a casing 3 for accommodating a disk drive
2; a Peltier element 4 used as means for controlling the temperature
being close to the upper surface of the casing 3 through an intermediate
plate 18; a heat sink 5 being close to a base slice 50 on
the lower surface of the Peltier element 4; an electric fan 6 for
ventilating air to the heat sink 5; and a housing 11 for accommodating
the casing 3 in the upper part as well as securing the heat sink 5 and
the electric fan 6 to the lower part.