The present invention provides an optical head capable of holding an aberration compensation lens without using electric power, and of making accurate positioning while having a high resistance to earthquakes. An aberration compensation lens(4) is disposed between a laser light source(3) and an objective lens(5), and a lens holder(10) is friction-joined to a drive shaft(7) through a friction holding body(8). A piezoelectric element(6) is installed at one end of the drive shaft(7). The piezoelectric element(6) is expanded and contracted by applied voltage. The rate of change is caused to differbetween the raising and lowering of voltage applied on the piezoelectric element(6), thereby moving the lens holder(10) relative to the drive shaft(7) axially of the drive shaft.