This study aims to (1) analyze students English vocabulary mastery (2) describe the process of applying flashcard media and analyze students English vocabulary mastery after using flashcard media, and (3) find factors that support and hinder the application of flashcard media for fifth grade children at MI Rare Muchtary. Sources  of data were obtained from 32 student of five grade in MI Rare Muchtary. The results showed that the students mastery of english vocabulary was quite good although in reality several things were found to be factors in the learning process, both factors from students and environmental factors.