A proximity sensor includes: a support substrate having a main surface and a rear surface; a surface emission laser; a light receiving part; and a resin body, wherein the surface emission laser is disposed on the main surface so as to emit light in a direction away from the rear surface; wherein the resin body is made of a light transmissive resin, and is disposed on the main surface so as to cover the surface emission laser and the light receiving part, and a portion of the resin body between the surface emission laser and the light receiving part is formed of the same light transmissive resin as the other portions, and wherein the light receiving part is disposed at a position at which the light emitted from the surface emission laser is reflected at an object and reflected light from the object is incident onto the light receiving part.