The purpose of the paper is to investigate an EOQ model with immediate return for imperfective items under the condition that fuzziness is introduced in both of demand and perfective rates. First, we construct the model in terms of annual profit and find the optimal order quantity with crisp case. Next, we develop the fuzzy inventory model by fuzzifying the demand and perfective rates, and utilize the Yager's ranking method to determine the optimal order quantity. Third, we also provide an expression of the optimal order quantity for the case that both of the demand and perfective rates are triangular fuzzy numbers. Finally, based on 25 combinations of triangular fuzzy numbers of demand and perfective rates, a numerical example is provided to explore the features of the model.