an optical disc apparatus includes a light source for emitting laser light , a light source drive unit for driving said light source , an optical element for splitting the laser light into a plurality of light fluxes , an optical element drive unit for controlling the optical element , an element for focusing the laser light onto the optical disc , and a detection unit for detecting the laser light reflected by the optical disc . reproduction of the optical disc is performed by switching effectiveness and ineffectiveness of a function of splitting the light flux of the optical element , and adjustment of an outgoing laser power is performed .