A side-emission type semiconductor light-emitting device 10 includes a substrate 12, and the substrate 12 is provided with a case 14 formed of a resin having opacity and reflectivity. The substrate 12 is formed, on its surface, with electrodes 18a and 18b onto which an LED chip 20 is bonded. A transparent or translucent resin 16 is charged between the substrate 12 and the case 14 whereby the LED chip 20 is molded. A light-emitting surface of the side-emission type semiconductor light-emitting device 10 includes surfaces 16a, 16b and a surface opposite to the surface 16b which are formed of the transparent or translucent resin 16. Furthermore, the light-emitting surface is formed by a roughened surface. Due to this, a light outputted from the LED chip and a light reflected from the case 14 is scattered by the light-emitting surface.