Vocabulary is important in language learning, including in English classroom. However, there are some students who are lack of vocabulary. This research aimed to investigate the use of English novel in improving students’ vocabulary mastery in EFL classroom. There are two research questions proposed by the researcher. The first is ‘What are the students’ strategies to master vocabulary through reading an English novel?’ and the second is ‘What are the benefits of reading English novel in EFL classroom?’. To answer the research questions, the researcher employed a qualitative research methodology. Interview was used as an instrument to gather the data. The interview guideline was created by researcher related to the literature review and the aims of the research. The researcher involved four participants of students’ batch 2014. This research revealed that the strategies used by students in improving vocabulary through reading English novel are looking up the dictionary; memorizing; note taking; asking friends; searching the meaning in the internet; guessing; and looking for synonym all of these are included as receptive vocabulary. The next findings are, using word in the sentence; using word in context; repeat reading; summarizing; and learning how to spell which are included as expressive vocabulary. The research also found that the benefits of reading and English novel. The findings are classified in two categories. First category is psychological effects which are feeling happy and consoled; being motivated and being more curious. Second is English skills effects which are improving vocabulary; improving skill in English; improving grammar; getting new knowledge; and learning new culture.