This thesis intends to clarify that the critical thinking in the essay type statement must be performed in the frame of writing education. The main points of this thesis are as follows. First, the latest discourse about essay type statement shows a tendency toward the improvement of critical thinking. Second, I intend to make clear that there is the similar repetition between critical thinking and writing ability. So I confirm the theoretical basis that the education about essay type statement must be united into the frame of writing education. Third, It is possible that the critical thinking can be united in the frame of writing education, if the rhetoric is imported in the process of writing education. [Key words] writing education, essay type statement, critical thinking, rhetoric