<p>An optical pickup includes: two laser diodes respectively operable to emit optical beams having different wave lengths; a diffraction grating operable to diffract each optical beam to a zero order diffracted beam and plus and minus first order diffracted beams; a holographic optical element operable to diffract the beams reflected from a recording medium; and photoelectric devices operable to receive the beams diffracted by the holographic optical element, wherein a photoelectric device for generating a tracking error signal and a photoelectric device for generating a focus error signal are disposed on opposite sides with respect to the laser diodes so as to face each other.</p>
