There is provided an optical disc recording/reproduction device capable of
accurately performing the focus offset and spherical aberration
correction even for an optical disc having no data recorded. The optical
disc recording/reproduction device includes: an optical pickup having a
spherical aberration corrector for correcting the spherical aberration of
an objective lens; and various control units; and can generate a tracking
error signal (TE) at least by a push-pull signal by the push-pull method.
When an optical disc mounted is in an unrecorded state, the spherical
aberration correction amount and the objective lens focus offset amount
are adjusted according to the push-pull signal, predetermined data is
recorded on the optical disc, and the reproduction signal obtained by the
data is used to adjust the spherical aberration correction amount in the
spherical aberration corrector of the optical pickup and the focus offset
amount of the objective lens.