Abstract: A decorative tube with neon tube to be fixed to an installing base compises a transparent tubular body, a neon tube and a transformer. The neon tube and the transformer are provided within the transparent tubular body, and the transformer is for properly setting the neon tube into a luminous state. A decorative tube is fixed various installing bases, for example installing base made of steel pipe, section steel, wall, or scaffold set up at a construction site. A decorative tube is also made of hard tubular body with an opening on its circumferential wall according to the region wherein the neon tube is disposed. The decorative tube with neon enhances the appearance of construction sites or the like.