In an optical disk manufacturing apparatus, a movement mechanism changes the movement speed of a laser beam irradiation component from a first to a second speed at a first radial position located within where the laser beam irradiation component moves from an inner peripheral region of the optical disk to an identification information recording region of the optical disk, and changes the movement speed from the second to a third speed at a second radial position at which the laser beam irradiation component has reached the identification information recording region at the second speed. The second speed is lower than the first speed and the third speed. The laser beam irradiation component records the identification information by irradiating with a laser beam while alternating between a first power level and a second power level low enough not to crystallize the recording layer, when moving through the identification information recording region.