Abstract: In an optical head device having a laser light source, an output adjusting member for adjusting the output of laser light emitted from the laser light source and a frame for supporting the laser light source and the output adjusting member, the output adjusting member has an adjusting circuit board for adjusting an electrical resistance value, and a plurality of circuits on which chip resistors and short lands are connected to one another in parallel are connected in series.

Abstract: An optical axis adjusting device for adjusting an optical axis in an optical head device may include a rotatable part which is turnably mounted on a main base so that the optical head device is capable of being turned with an axis X which is set to be at a spot position of one of the return light beams of the two laser beams. The optical axis adjusting device may include a correcting means for converting an optical axis shift on the light receiving face when the other laser beam is emitted to a non-corresponding optical medium, into an optical axis shift on the light receiving face when the other laser beam is emitted to the other corresponding optical medium.