Optical pickup device and optical disk apparatus

The present invention discloses an optical pickup apparatus and an optical disc apparatus, even if the center axis of the light intensity distribution of the semiconductor laser are offset, it is possible to accurately detect the information signal. The optical pickup apparatus comprising: a light transmitting optical system having a light source for emitting light, and adapted to converge the light onto the optical disc; photodetection optical system having a light detector comprising a plurality of light receiving elements and adapted by the reflected light onto the optical disc on the light detector; and the amount of light of the respective light receiving elements of a photodetector balance adjustment optical element, for balancing incident.