A method for producing propylene including: transferring a feed gas including dimethyl ether and/or methanol and C4 and/or C5 olefins into a reactor, and reacting the feed gas in the presence of a catalyst, the feed gas prior to transferring into the reactor having a (supplied C4 and/or C5 olefins)/(supplied dimethyl ether and methanol) ratio of 0.25 to 7.5, in terms of the molar ratio based on the number of carbon atoms, and the feed gas being contacted with the catalyst at 350° C. to 600° C.; and an apparatus for producing propylene including: a hydrogenation reactor in which alkynes and/or dienes contained in C4 and/or C5 hydrocarbons is partially hydrogenated to be converted into an olefin having one double bond; a reactor in which C4 and/or C5 hydrocarbons is reacted with dimethyl ether and/or methanol in the presence of a catalyst; and a separator for separating propylene from the reaction product.