To provide an optical semiconductor for infrared ray communication which can be incorporated into a remote control transmitter without increasing the size of a light emitting device having a plurality of communication wavelengths.

The optical semiconductor for infrared ray communication comprises a plurality of infrared ray LEDs 11A, 11B for emitting infrared rays with different communication wavelengths and a drive circuit 12 comprising a semiconductor and for simultaneously driving the infrared ray LEDs. Thus, the drive circuit 12 is used in common for the infrared ray LEDs 11A, 11B in compliance with a plurality of the wavelength standards, the space of the optical semiconductor for infrared ray communication can be reduced more than the case with providing a drive circuit individually to each wavelength standard and then a large-sized constitution can be avoided in the case of mounting the optical semiconductor for infrared ray communication to a small-sized device such as a mobile telephone.