An optical drive apparatus that reproduces an optical disk having a land and a groove, the optical drive apparatus comprising: an optical system for irradiating a recording surface of the optical disk with an optical beam; an optical detector that receives a reflected light of the optical beam reflected from the recording surface; a first tracking-error-signal generating unit that generates a first tracking error signal by using a DPD method, based on a light receiving amount of the optical detector; a second tracking-error-signal generating unit that generates a second tracking error signal by using a DPP method, based on the light receiving amount of the optical detector; and a tracking servo unit that controls the optical system based on either one of the first and second tracking error signals, characterized in that the optical drive apparatus further comprises a determining unit that determines that an irradiation point of the optical beam is in a non-recorded area based on only the second tracking error signal, and when the second tracking error signal has changed beyond a first predetermined range, wherein the tracking servo unit switches over to a control based on the second tracking error signal in response to a result of determination that the irradiation point of the beam is in a non-recorded area by the determining unit during performing a control based on the first tracking error signal when reproducing the optical disk; and wherein the tracking servo unit switches over to control based on the first tracking error signal in response to whether the second tracking error signal is within a second predetermined range that is narrower than the first predetermined range during performing the control based on the second tracking error signal. an optical system for irradiating a recording surface of the optical disk with an optical beam; an optical detector that receives a reflected light of the optical beam reflected from the recording surface; a first tracking-error-signal generating unit that generates a first tracking error signal by using a DPD method, based on a light receiving amount of the optical detector; a second tracking-error-signal generating unit that generates a second tracking error signal by using a DPP method, based on the light receiving amount of the optical detector; and a tracking servo unit that controls the optical system based on either one of the first and second tracking error signals, characterized in that the optical drive apparatus further comprises a determining unit that determines that an irradiation point of the optical beam is in a non-recorded area based on only the second tracking error signal, and when the second tracking error signal has changed beyond a first predetermined range, wherein the tracking servo unit switches over to a control based on the second tracking error signal in response to a result of determination that the irradiation point of the beam is in a non-recorded area by the determining unit during performing a control based on the first tracking error signal when reproducing the optical disk; and wherein the tracking servo unit switches over to control based on the first tracking error signal in response to whether the second tracking error signal is within a second predetermined range that is narrower than the first predetermined range during performing the control based on the second tracking error signal.