An optical pickup apparatus comprises: a first light source; a second
light source; a third light source; and an objective optical element. The
objective optical element comprises at least two areas comprising first
and second optical path difference providing structures. A third light
flux from the third light source passing the first optical path
difference providing structure forms first and second best focuses. The
third light flux passing the objective optical element forms a spot
comprising a central spot portion; an intermediate spot portion; and a
peripheral spot portion. The central spot portion is used for recording
and/or reproducing information for a third optical disk, and the
intermediate and peripheral spot portions are not used for recording
and/or reproducing information for the third optical disk. The peripheral
spot portion is formed on the third optical disk by the third light flux
through the second optical path difference providing structure.