The purpose of this research is to investigate the improvement of using animation film in improving students’ vocabulary mastery and to find out the responses from students’ toward animation film in improving vocabulary mastery. The researcher used quantitative methods, the researcher used pre-test, treatment, and post-test to collect data. The population in this study was class VII students at SMP Negeri 18 Banda Aceh, totaling 29 students, with 16 male students and 13 female students in one class. The research results showed that there was an increase after the implementation of animation film. Almost all students got improvement after treatment. The scores of students in the technique media animation film improve significantly from the pre-test and pos-test, with an average differences of pre-test 35.51 and post-test 76.27. Animation film can really improve students' vocabulary mastery and help teachers in learning. Apart from that, animation film can also make it easier for students to remember vocabulary and students don't get bored quickly when learning. However, a small number of other students find it a little difficult to listening their vocabulary through this film. This difficulty is because there are some students who lack focus in learning when the film is showed.