PURPOSE: To transmit light projected from an end face in a tubular illuminant easily and apply a large quantity of light from the side face of the tubular illuminant, to make an upper side face exposed onto the road surface of a display body shine brightly at a wide angle, to make the display of the road surface view easily by a man and to prevent the crushing and damage of the tubular illtminant because there is a hard transparent long-sized body on the surface even when a car, etc., pass on the display body.

CONSTITUTION: The upper side face of a display body 2, in which a tubular illuminant 4 is inserted into a transparent long-sized body 3, is buried at the road-surface display place of a road 9 while being exposed onto a road surface, and the tubular illuminant 4 is elongated and the end face of the illuminant 4 is mounted towards a light source 5 installed to the side edge of the road 9. A core 42 having a refractive index higher than a flexible tube 41 is introduced into the flexible tube 41 in the tubular illuminant 4.