An optical pick-up apparatus which can adaptively compensate for the aberration of a light beam. The optical pick-up apparatus employees a first light source for generating a first light beam having a first wavelength to be irradiated on a first type of disk and a second light source for generating a second light beam having a second wavelength to be irradiated on a second type of disk. A light path enables the first light beam from the first light source to be irradiated on the disk in the shape of a spot by a finite optical system. The light path allows the second light beam from the second light source to be irradiated on the disk in the shape of a spot by an infinite optical system.