ABSTRAKThe purpose of this research is to investigate to what extent the “EnglishZone” an English textbook meets the criteria of a good textbook suggested by AlanCunningsworth.This research used evaluative method, which referred to content analysis ordocumentary analysis. It was conducted from August 2013 to October 2015. Thepopulation of this research is all chapters of the textbook for tenth grade of SeniorHigh School, that is “English Zone”, written by Eka Mulya Astuti, published byPenerbit Erlangga. In collecting the data, the writer used a documentary analysis asthe technique. He took all units in the textbook analyzed as the sample of theresearch.The findings of the study show that “English Zone” is very good. Itspercentage is 77.7%. the textbook fulfilled some criteria of a good textbook suggestedby Alan Cunningsworth as it has 70 out of 90 score. The result of this study implies that the teacher can use the textbookalthough it has not fulfilled all the demands of criteria of good textbook suggested byAlan Cunningsworth. The writer of the textbook should revise and add morelanguage content, methodology, and teacher’s book proportionally to make thequality of the whole textbook better.