Abstract: The aim of this study was to evaluate the suitability of the textbooks "World English 1", as a book written by native speakers of English, and "ILI 1", as a book written by non native speakers of English for elementary level students based on two criteria (illustrations, and physical make-up) adopted from Doaud & Celce- Murcia’s (1979) checklist in a comparative way. The study was conducted at Atlas Language Institute in Urmia and Iran language Institute (ILI) in Urmia. The participants of the study were 120 and 100 students (50 in each institute) and 20 teachers (10 in each institute). Then, the obtained data were analyzed by calculating the level of meaningfulness, mean score, and T value by using SPSS software. The results of the study revealed that illustrations and physical make-up which students rated them as having almost equal suitability were not rated as the same by teachers; since teachers, resorting their experiences and profession, believe that native written book is better than nonnative written one.