To provide a signboard with an illumination lamp having energy-saving effect, having such structure that the signboard and the illumination lamp setting body can be separated and an irregular reflecting plate is provided to the illumination lamp.

A sign curved face back plate includes an upper-sign curved face back plate with a horizontal upper-edge section; a lower-sign curved face back plate 12b with a horizontal lower edge section, at a place corresponding to a lower horizontal rectangular frame; and an illumination lamp fitting transparent curved face 12e, which is formed horizontally in the middle of the upper-sign curved face back plate and the lower-sign curved face back plate. The sign-curved face back plate is attached to a box body, having a rectangular frame 10b formed in the depth direction at upper and lower edges and both side edges of a signboard surface plate 10c and made into a bag-shape signboard 10, by attaching the rectangular frame of the box body in a single unit. The illumination lamp 40 and the irregular reflecting plate 42 are provided at a place, corresponding to illumination lamp fitting groove; and in this structure, the illumination lamp setting frame body can be separated from the bag-shape signboard.

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