To perform mass production at a low cost and to be fixed in an adhering state on the surface of the heat insulation material of pipe joints slightly different in a shape.

The surface decorative cover of a pipe joint is molded in a shape conforming to that of the surface of a pipe joint 2, such as elbows and tees, covered with a heat insulation material 3. Further, A surface decorative cover 4B is partially cut so that it can be opened when the heat insulation material 3 of the pipe joint 2 is covered with the surface decorative cover. The surface decorative cover 4B is attached on the surface of the pipe joint 2 covered with the heat insulation material 3 to decorate the surface of the heat insulation material 3. Further, the surface decorative cover 4B of the pipe joint 2 is a substance wherein non-woven cloth 5 having plastic fibers collected in a solid manner without directional property is molded in a shape conforming to that of the surface of the pipe joint 2 covered with the heat insulation material 3.