The invention provides an electronic apparatus to which a circuit board is attached so that noise caused by a drive unit can be prevented. The electronic apparatus includes a drive unit 2 and a circuit board 5 mounted with electronic components 4 for controlling the drive unit 2. Conductive circuit patterns are formed on both sides of the circuit board 5, and the electronic components 4 are mounted only on one surface of the circuit board 5. The circuit board 5 is attached to the electronic apparatus with anon-mounting surface thereof faced to the drive unit 2, whereby noise caused by the drive unit 2 is blocked by the circuit board 5. Consequently, it is possible to reduce noise of the drive unit 2 from affecting the electronic components 4 mounted on the circuit board 5. In addition, since the non-mounting surface of the circuit board 5 is faced to the drive unit 2 side, the freedom of design on the device side is improved.