A semiconductor laser device includes: a semiconductor laser chip which is
composed of a semiconductor substrate and a plurality of semiconductor
layers stacked on an element formation face of the semiconductor
substrate and which outputs an irradiation light for irradiating an
optical disk; and a light receiving element which receives the
irradiation light reflected by the optical disk as a feedback light. The
semiconductor laser chip includes on one face thereof an electrode facing
an optical element and is fixed in a package so that at least one of
sub-beams reflected by the optical disk is incident on the one face. A
chip exposing portion for exposing a region of the one face where the
sub-beam is incident is formed in the electrode.