The optical lens 1 in accordance with the present invention comprises an optically effective part 5, formed as a curved surface in at least one of light-entrance and light-exit faces, for acting in an X-axis direction on light emitted from a light-emitting device; and a pair of protrusions 10, integrally formed in the face on the side provided with the optically effective part 5, projecting in an optical axis direction on both sides of a light-transmitting area; the pair of protrusions 10 projecting beyond a surface of the optically effective part. Such an optical lens 1 can prevent the optically effective part 5 from coming into direct contact with an arrangement surface where the optical lens 1 is placed, side faces of members adjacent to the optical lens 1, and the like in each manufacturing step, during delivery, and so forth, whereby the optically effective part 5 is hard to incur damages and the like.