NOVELTY - A reactor comprises an insertion container (13) installed in the reactor (20), an exhaust gas discharge port positioned on the lower part of the insertion container, an exhaust gas leakage prevention wall surrounding the discharge port and formed on the outer wall of the insertion container, a zinc vapor supply pipe (8) which supplies zinc vapor (10) to a silicon tetrachloride vapor supply pipe (7) which supplies silicon tetrachloride vapor (9) to the insertion container, and a discharge pipe (6) for discharging exhaust gas (11) in the lower part of the reactor.    USE - A reactor for manufacturing polycrystalline silicon (claimed) used for solar cells.    ADVANTAGE - Highly purified polycrystalline silicon is obtained, and production efficiency is improved.    DETAILED DESCRIPTION - A reactor comprises an insertion container (13) installed in the reactor (20), an exhaust gas discharge port positioned on the lower part of the insertion container, an exhaust gas leakage prevention wall surrounding the discharge port and formed on the outer wall of the insertion container, a zinc vapor supply pipe (8) which supplies zinc vapor (10) to a silicon tetrachloride vapor supply pipe (7) which supplies silicon tetrachloride vapor (9) to the insertion container, a discharge pipe (6) for discharging exhaust gas (11) in the lower part of the reactor, an inert gas supply pipe for supplying inert gas to the reactor, an interpolated tube (14) installed in the discharge pipe, and a clearance gap formed between the interpolated tube of the discharge pipe and the exhaust gas leakage prevention wall and between the insertion container and end pipe of the interpolated tube. The reactor produces polycrystalline silicon by reacting silicon tetrachloride and zinc.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the reactor for manufacturing polycrystalline silicon.    Discharge pipe (6)    Silicon tetrachloride vapor supply pipe (7)    Zinc vapor supply pipe (8)    Silicon tetrachloride vapor (9)    Zinc vapor (10)