A driving device includes an electro-mechanical transducer having first
and second end portions opposite to each other in an
expansion/contraction direction, a stationary member coupled to the first
end portion of the electro-mechanical transducer, a vibration friction
portion coupled to the second end portion of the electro-mechanical
transducer, and a rod-shaped moving portion frictionally coupled to the
vibration friction portion, whereby moving the moving portion in the
expansion/contraction direction of the electro-mechanical transducer. The
vibration friction portion is made of a material having a vibration
transfer rate of 4900 meters/second or more. The moving portion is made
of a material which has a vibration transfer rate of 4900 meters/second
or more and which is different from that of the vibration friction
portion.