A manufacturing method of a tank (1) including a tubular body portion (2), and dome-shaped side end portions (3, 4) formed on both sides of the body portion, the manufacturing method includes forming a tubular compact (20A) serving as at least part of the body portion (2) from one fiber reinforced resin sheet (25A) by winding the fiber reinforced resin sheet (25A) including reinforced fibers impregnated with thermoplastic resin several times around a peripheral surface of a core (5A) from a direction perpendicular to an axial center of the core in a state where the thermoplastic resin is melted.