<p>Provided is an optical head by which influence of interference due to reflection light from a non-reproducing layer of a multilayer optical disc can be reduced and excellent servo signal and a reproduction signal can be obtained. The optical head is provided with a first optical system which collects light from a light source to a first recording layer or a second recording layer; a second optical system which receives and transmits reflection light reflected by the first recording layer when light is being collected to the first recording layer and stray light reflected by the second recording layer; a light receiving element; and an operating section. Each light receiving region of the light receiving element outputs a signal corresponding to a quantity of light entered through the second optical system. The reflection light and the stray light entered the second optical system interfere with each other, and first and second light receiving region groups of the light receiving element are arranged to be uniformly influenced by light quantity fluctuation caused by the interference. The operating section performs differential operation to the sum of the first signal group outputted from the first light receiving region group and the sum of the second signal group outputted from the second light receiving region group, and a focus error signal is generated.</p>
