Off-center container manufacturing method and temperature adjustment mold

A method of manufacturing a neck bent container comprising:

• injection molding a preform having a bottomed cylindrical shape, the preform being made of resin,
• stretching the preform containing residual heat from the injection molding with a stretching rod;
• and
• blow-molding the neck bent container, in which a central axis of a container neck portion is inclined with respect to an axial direction of a container body portion, by introducing a pressurized fluid into the preform disposed in a mold, wherein
• the container body of the neck bent container has a flat shape in which a dimension in a first direction in a container cross section is longer than a dimension in a second direction of the container cross section that is perpendicular to the first direction,
• the container neck portion is inclined in the first direction,
• in a circumferential cross section of the preform, a thickness of a first region corresponding to a surface extending in the first direction of the container cross section is set to be thicker than a thickness of a second region corresponding to a surface extending in the second direction of the container cross section, and
• the thickness of the first region in the axial cross section is set to be thicker on a bottom portion side than an opening side.