An optical pickup includes: a frame, having a first face formed with a groove, a second face opposite to the first face, a first hole in which a diffraction grating is disposed, and a second hole communicated with the groove and the second face; a spring plate, attached to the first face; and a spring member, including a ring portion disposed in the first hole and abutting on the diffraction grating, a first arm portion extended from an outer peripheral edge of the ring portion and inserted in the groove, and a second arm portion connected to the first arm portion and inserted in the second hole.