An optical disc reading and reproducing apparatus includes reading means for reading data recorded on an optical disc by applying laser light to the disc through an objective lens and detecting reflected light, focus control means for performing focus control for moving the lens based on a focus error signal, and focus bias adjustment means for adjusting a focus bias to a voltage in which amplitude of an RF signal acquired by the reading means is maximized. When a difference between addresses of a focus bias adjustment information and at which data is read exceeds a predetermined amount, and amplitude of the RF signal is smaller than the amplitude of the RF signal stored, the focus bias is readjusted and the stored focus bias adjustment information is updated to the amplitude of the RF signal after this readjustment and the address of the track to which the focus bias is adjusted.