The present invention provides a vinyl chloride resin having a high void ratio and micropores in the interior of particles thereof and allowing high level filling and distribution of various compounding additives a method of producing the same; a chlorinated vinyl chloride resin having good gelation properties and heat resistance and a method of producing the same; a chlorinated vinyl chloride resin having good heat resistance and manifesting good gelation properties and a method of producing the same; highly heat-resistant chlorinated vinyl chloride resin pipes and joints excellent in heat resistance and shock resistance; and highly heat-resistant chlorinated vinyl chloride resin plates excellent in heat resistance, shock resistance and chemical resistance; and heat-resistant vinyl chloride resin moldings excellent in heat resistance and smoothness and having a good appearance; heat-resistant vinyl chloride resin pipes having high heat resistance, excellent in smoothness.