The study is concerned with teaching methods of the critical writing and writing using TV advertisements. The ultimate end of this study is the development of critical thinking in writing class. The critical writing is based upon a premise that it is needed the critical reading first and it is the act to turn reading into writing. So, I plan the class composed of three courses. The first course is the critical reading of TV advertisements and the other courses are to express critical reading (in other words, one`s thoughts) in writing. In the first course, students will be able to learn the course of critical reading. It consists of four parts: Reading of the basic building block of the text, Analysis of meanings in the text, Evaluation for the text, and Self-monitoring. The second and third course is run as follows. Students have to do critical reading of TV advertisements with the critical reading procedures aforementioned beforehand. And then they present the result of the critical reading in class. The student response of this class is very positive. And I think that this teaching method is helpful in training of critical thinking and writing.