Educators have become increasingly concerned about teaching thinking and reasoning skills, and numerous materials are currently under development. Improving the thinking and reasoning skills of students can be an important benefit of as effective citizenship education program.The purporse of this article is to clarify the relationship between teaching critical thinking and civic edcuation. The author, firstly, defined the definitions of critical thinking and its dimensions; then, identified the model of teaching critecal thinking and, guidelines, for integrating critical thinking across the curriculum; and, thirdly, indicated the steps of preparation for teaching critecal thinking and alternative teaching techniques; finally, the importance of critical thinking in the field of civic education was discussed. In sum, there is a conclusion can be drawn from the educational literature, that is, being the essential ability of a responsible citizen in the 21st century, critical thinking skills must be developed through all levels of educational settings.