To provide an LED display device, in which the polarity of a frame can be easily visually confirmed from the upper part, when the LED display device is mounted.

In the LED display device, having a base of an integrally molded body of the frame and a resin-molding package, a flat portion is provided on a surface facing the mounting surface of the resin-molded package and the symmetry properties of the shape of this flat portion is broken, and thus, the flat portion can be utilized for visual recognition of the polarity of an electrode. The frame projecting to the mounting surface side of the resin-molding package is used as an electrode surface, and this electrode surface is bent in a direction reverse to the light-emitting direction.