To provide a driving unit, capable of improving the precision of driving control for an object to be driven by making a tip member surely carry out desired movements.

This drive is provided with regulating members 50, 50' for retaining a piezoelectric actuator 10 fitted at a position opposite to a rotor R relative to the piezoelectric actuator 10. The regulating members 50, 50' are disposed through a clearance, from the piezoelectric actuator 10, of more than the amplitude of vibration occurring at the piezoelectric actuator 10.