English vocabulary is an important element in learning English. The ability to use the vocabulary of the students is a factor that would indicate how well a student communicate. Vocabulary is essential that students need to learn always but it also found that obstacle of English reading is vocabulary is that student do not know meaning, incorrect reading makes unable understand an communicate. The researchers have interesting to study on Reading Ability of English Vocabulary of First Years Students in the Major English for International Communication (B.E. 2557) in Rajamangala University of Technology Isan for guideline and development on learning English in the next higher level.