To provide a light-emitting semiconductor device having a built-in drive integrated circuit chip that has a wide and stable color gamut, can generate a blended effect without aging, and is suitable for mass production.

Light-emitting diode chips of at least three colors of red, green and blue, and a drive integrated circuit chip are mainly packaged on an insulating board together. The drive integrated circuit chip functions as a constant current output, sets the amount of a current output in each current output port of the drive integrated circuit chip by characteristics of the light-emitting diode chip whose color is different, and adjusts light emission luminance in each light-emitting diode chip, thus obtaining a specified blended effect.