To facilitate maintenance and inspection of a main body without accumulating dew condensation on the main body by attaching a planer light guide body with the top face of a display light main body and both ends opening and forming the reflection face at both side edges of the light guide body positioned at the opening at both ends.

This luminaire for display attaches a planar light guide body 15 inside a light transmission display lamp main body 14 displaying a pattern on the display face and arranges a reflection plate 16 on the rear face of the light guide body 15, and arranges a light source 13 at the upper part of the display lamp main body 14. The top face both sides of the display lamp main body 14 are opened, and planar light guide body 15 is engaged with the inside of the display lamp main body 14. In addition, the reflection plate 16 is formed at both-side edge part of the guide body 15 positioned at the both-end opening of the display lamp main body 14. According to the luminaire for display of this structure, dew condensation is never accumulated inside the display lamp main body 14, and there is no need for removing the display lamp main body 14 from the light source storage box comprising arranging an internal straight-tube fluorescent lamp, storage battery 12, and electric parts when cleaning the inside of the display lamp main body 14 and the light guide body 15.