Abstract: The optical disk player is capable of selectively executing the optimum power control test in power calibration areas and shortening the time for writing data if required. The optical disk player of the present invention writes data on an optical disk having a first power calibration area located on an inner side of a read-in area and a second power calibration area located on an outer side of a read-out area. A type of optimum power control test executed in one of the power calibration areas or in the both of the power calibration areas is selected. The optimum power control test is executed in one of the power calibration areas or in the both of the power calibration areas on the basis of the type of optimum power control test selected.