The importance of the course books in language teaching leads the way to the evaluation of them. Evaluating the teaching materials specially course books can help teachers to understand more about language learning. The purpose of the present study is to evaluate English Results course books which are widely used at Iranian institutes. The focus of the study is on the course books used at advanced lined and evaluating their physical make-up, practical concerns and different sections of them namely vocabulary, reading, grammar, language functions and pronunciation practice.100 teachers from six different institutes participated in the study and completed the questionnaire which was prepared by Hashemi and Rahimpour (2011) for textbook selection and evaluation in EFL context. Results revealed that the course books were generally regarded as appropriate materials. Finally, several suggestions were mentioned for adding to the quality of the course books.