The present invention relates to a method for producing trichlorosilane. In this method for producing trichlorosilane, first, silicon tetrachloride and hydrogen are subjected to a conversion reaction at a temperature of equal to or higher than 1000° C. and equal to or lower than 1900° C., to produce a reaction gas containing trichlorosilane, dichlorosilylene, hydrogen chloride and high-order silane compounds, and then the reaction gas discharged from the conversion furnace is cooled to 600° C. or higher within 0.01 seconds from the initiation of cooling and to 500° C. or lower within 2 seconds. Subsequently, the reaction gas is maintained in a temperature range of equal to or higher than 500° C. and equal to or lower than 950° C. for a time period of equal to or longer than 0.01 seconds and equal to or shorter than 5 seconds. The reaction gas is further cooled to below 500° C.