Textbooks are fundamental mediums to guide the process of teaching and learning. There is a significant attention toward aspects of a textbook to qualify for these ends. This study aims at investigating a descriptive survey to evaluate teachers' and students' attitudes on the Pre-University English textbook in Iranian High Schools. It determines the pedagogical value of the textbook according to student's needs. To this end,30 teachers and 156 students, randomly selected, participated in the research. The textbook evaluation was conducted through the questionnaire developed by Litz (2005). The checklist considered seven main criteria: practical consideration, layout and design, activities, skills, language type, subject and content and overall consensus. The results revealed that both teachers' and students' perceptions about the textbook were almost positive in general. However, teachers stated that the textbook lacksskill appropriacy. Students believed that the textbook was not suitable regarding activities, skills, and the overall consensus.