An optoelectronic integrated circuit device which has less signal damping and signal transmission loss is provided. The optoelectronic integrated circuit device of the present invention includes a first optoelectronic integrated circuit and a second optoelectronic integrated circuit. Each of the first optoelectronic integrated circuit and the second optoelectronic integrated circuit includes an electric circuit unit, an optical output terminal unit, and an optical input terminal unit. The first optoelectronic integrated circuit and the second optoelectronic integrated circuit are arranged so that each optical output terminal unit faces each corresponding optical input terminal unit. In this arrangement, light signal transmission can be carried out between a plurality of optoelectronic integrated circuit devices. Thus, signal damping and transmission loss can be reduced, and signal transmission delay time can be shortened.