An optical disk drive controls recording power with high accuracy in accordance with a measured β value and a target β value. A system controller of the optical disk drive determines a β value at which jitter or an error rate becomes minimum, in both an inner radius and an outer radius of an optical disk, and determines a difference between the determined β value and the target β value for each of the inner and outer radii. A corrected value for an arbitrary position, arbitrary speed, and an arbitrary temperature is calculated from a difference achieved at the inner radius and a difference achieved at the outer radius, by means of linear interpolation. The measured β value for the arbitrary position, the arbitrary speed, and the arbitrary temperature is compared with the target β value after having been corrected, thereby controlling recording power.