Provided is a method for producing an optical fiber preform using VAD, in which oxygen, hydrogen and a silicon compound are supplied to a core deposition burner; silicon dioxide produced by the hydrolysis reaction in the oxyhydrogen flame is sequentially deposited at the tip of a starting material; the drawing rate is regulated to match the growth of the porous preform so that the deposition tip is at a fixed position; the average drawing rate is calculated at preset intervals; and the difference is calculated between the calculated average drawing rate and a preset drawing rate setting. Whenthe supplied hydrogen has been produced or stored at room temperature, the silicon tetrachloride flow rate is corrected according to said difference; and when the supplied hydrogen has been gasified from liquid hydrogen, the hydrogen flow rate is corrected according to said difference. When the hydrogen flow rate is corrected, the flow rate of hydrogen supplied to a cladding deposition burner is also corrected at the same ratio as the ratio of the flow rates of hydrogen supplied to the core deposition burner before and after correction.