A manufacturing method for an optical head device includes integrating at
least a plurality of light sources and a plurality of diffraction
elements with each other as an optical module, adjusting a relative
positional relationship of the plurality of diffraction elements each
other on the optical module, and then adjusting spot positions of the
sub-beams on the optical recording medium by adjusting the entire optical
module on the device frame. After that, the optical module is fixed on
the device frame.