An optical pickup includes: a lens holder having an objective lens, an optical component, a radiator plate formed of a sheet metal, and a base member on which the lens holder and the optical component are mounted, the base member being formed of a synthetic resin molded body. The base member has a base plate portion in which a light passage hole is opened in such a manner as to face the objective lens, a mounting wall on which the optical component is mounted and a mounting piece of the radiator plate is secured, and an enclosure wall that is erected substantially on an opposite side to the mounting wall across the light passage hole. The surface plate portion extends toward the enclosure wall and an end of the surface plate portion is fixed to a top portion of the enclosure wall.