The purpose of the present invention is to provide a transmission-side optical communication module that uses a multi-mode semiconductor laser, and an optical communication device provided with the same, wherein the transmission-side optical communication module and the optical communication device are able to suppress the influence of unnecessary high-order modes that can be a cause of noise. The transmission-side optical communication module (10) is provided with a semiconductor laser (14) and a transmission-side lens (18) through which a laser light emitted from the semiconductor laser (14) passes. The semiconductor laser (14) is a multi-mode semiconductor laser. The transmission-side lens (18) is arranged so that the optical axis L of the laser light passes through the lens (18). The beam diameter D2 of the laser light at the part where the laser light of the transmission-side lens (18) is incident is greater than the diameter D1 of the transmission-side lens.