PURPOSE: To increase the display area of a container main body and to suitably prevent the generation of wrinkles in a label by making it possible to display a character or pattern not only on the side peripheral surface of the container main body but also on the bottom surface thereof.

CONSTITUTION: A process wherein a heat shrinkable label 5 formed into a cylindrical shape is shrunk along a preforming mold and an auxiliary label 6 having a resin passing hole 9 and having a character or pattern displayed thereon is integrally bonded to one end part 5a of the label 5 to form a preformed product 14, a process closing a male mold 17 and a female mold 15 after the preformed product is inserted in the female mold 15 so as to provide a predetermined gap 19 between the preformed product 14 and the male mold 17 and a process injecting a molten resin material in the gap 19 through the injection passage 16 formed to the female mold 15 and the resin passing hole 9 of the auxiliary label 6 to form a container main body 3 are provided.