To realize an optical pickup which is compatible with the dynamic variation in the thickness or the tilt of an optical disk and does not cause a deviation of the optical axes of a plurality of lenses in a tracking time even in a case where a high numerical aperture(NA) is adopted in a configuration of a plurality of lenses for a condenser lens.

In the optical pickup 5, a first lens 16 and a second lens 17 are mounted as a condensing lens means which condenses a light beam 9 on the optical disk 1 on a slider 10 which is floated with respect to the optical disk 1 via an air bearing. The gap between the first lens 16 and the second lens 17 is controlled by a piezoelectric element layer 15 provided on the slider 10.