The present invention can promptly start the tracking control. According to an embodiment of the present invention, after making it possible to discriminate the groove G and land L by the initial drive for the objective lens, the servo control and brake control are executed under an optimum condition when the objective lens is initially driven to the inner circumference direction to be outer eccentricity where a spot Pt is easily pulled in so as to pull in the spot Pt and start tracking control, and, in case the TR control error is raised when pulling in the spot Pt in an eccentricity speed minimum region AR1 for the first time, assuming that the eccentricity speed minimum region AR1 is inner eccentricity, the spot Pt is pulled in at the next eccentricity speed minimum region AR2 in which the eccentricity direction becomes opposite and the tracking control is started.