An apparatus for producing trichlorosilane includes a reaction container in which a supply gas containing silicon tetrachloride and hydrogen is supplied therein and a reaction product gas containing trichlorosilane and hydrogen chloride is produced; a heat transfer body which is filled in the reaction container, which is formed of a material having a melting point of at least higher than 1,400° C., and which has a void part which enables a gas to be passed; and a heating mechanism heating the heat transfer body in the reaction container.