Method and apparatus for manufacturing trichlorosilane

An apparatus 1 for manufacturing trichlorosilane includes a decomposition furnace 2 into which polymers and hydrogen chloride are introduced, the decomposition furnace 2 includes: a heating device 11 which heats an interior of the decomposition furnace 2; a reaction chamber 4 which is formed in the decomposition furnace; a center tube 3 which is inserted in the reaction chamber 4 along a longitudinal direction of the reaction chamber and has a lower-end opening portion 3a; raw-material-supply pipes 5 and 6 which supplies the polymer and the hydrogen chloride to the reaction chamber 4 at an exterior of the center tube 3; and a gas-discharge pipe 7 which leads out reacted gas from the center tube 3, the apparatus 1 further includes a fin 14 that leads the polymer and the hydrogen chloride to the lower-end opening portion 3a of the center tube 3 so as to stir the polymer and the hydrogen chloride.