<![CDATA[ABSTRACT: Reading is one of the based skills which are practically activity for the learners to learn in school or through life. Besides, all of the subjects need reading skill to develop students’ ability in academic because reading is the fundamental. However, learners often faced difficulties in reading comprehension. One of the factors affecting students reading comprehension is vocabulary. Vocabulary is one of the important components in English which is learners must prepare the words as the basic of language learning.The aim of this study was to find out whether there is any significant correlation between reading comprehension and vocabulary mastery. The researcher used quantitative approach with correlation research design. The number of the participants was of 73 students from class XI IPA-1 SMAN 1 Banda, XI IPS-1 SMAN 2 Banda and XI IPA SMAN 3 Banda.This study used achievement test that is used for testing and obtaining the score of both reading comprehension and vocabulary mastery that is 20 questions for reading comprehension and 20 questions for vocabulary mastery so the total is 40 items multiple-choice question. Both achievement tests were taken by 90 minutes for every school by the researcher.The result showed that there were 69.85% of students have well in reading comprehension test and 73.96% of students have well in vocabulary mastery test. The r observed of the students’ reading comprehension and vocabulary mastery was .422 at level of significant .000 lower than .05. It means that the correlation between reading comprehension and vocabulary mastery was significant at moderate level.The finding of the current study showed that the correlation between reading comprehension and vocabulary mastery was significant at moderate level. Other word, vocabulary is not the main factor affecting reading comprehension. Complexity of the text, environment condition, facility, interest and motivation, strategy, and background knowledge become another factors affecting students’ reading comprehension. It is based on the fact from the interview with English teacher and students. The findings give practical implication to the teachers, the researchers, and especially the readers.Keywords: correlation, reading comprehension, vocabulary mastery]]>
