To make the creation of a secondary processing method by which an uneven pattern can more three-dimensionally be formed while suppressing the thinning of the thickness at the edge part of the peripheral wall of a pipe made of synthetic resin a technical subject, and to provide a tubular container wherein the three-dimensional decorative property is demonstrated at a high grade.

The peripheral wall is supported from the inside by a core member inserted into the tubular body made of synthetic resin, and a protrusion-like pattern is formed on the peripheral wall by embossing process wherein a plate section on which a recess portion has been engraved is pressurized like a pressing state under a state wherein the plate section has been heated from the outside of the peripheral wall in the secondary processing method. In the secondary processing method, a protruding portion is formed at a position opposite to the recess portion of the core member in a manner to be able to be fitted in the recess portion. Then, the peripheral wall is heated from the inside as well through the core member, and the protrusion-like pattern is formed on the peripheral wall by making the peripheral wall deformed in such a manner that the peripheral wall may be pinched by the recess portion and the protruding portion.