As the Ministry of Education (2009) pointed out that the problems of English instruction in Thailand are lack of qualified teachers who possessed knowledge on the subject, overcrowded classes, and lack of effective teaching methodology and facilities. Therefore, to enhance the effectiveness of the English language teaching in Chiang Rai, and to prepare the proper preparation of English courses in the primary level, it is interesting to determine the problems and difficulties of English instruction in the primary school level in Nang Lae District, Chiang Rai province to see the real problems that they meet and to find out the solutions of their problems.