Aim: The importance of critical thinking has been increasingly emphasized in the nursing literature. The need for critical thinking in nursing has been emphasized in response to the rapidly changing health care environment. Nurses must think critically to provide effective care whilst coping with the expansion of roles and complexities of current health care systems. It s necessary to clarify critical thinking for nursing to reflect critical thinking. This article aims to clarify the concept ofcritical thinkingas put forward by Walker and Avant. Methods: Walker and Avant s well-established method of concept analysis was employed to clarify of the concept of critical thinking. Results: According to the concept analysis of critical thinking, it was determined that creative thinking, problem solving and decision making are the related concepts to critical thinking. The background of concepts and attributes such as intuition, curiosity and skepticism were realized. As a result of critical thinking, it was seen that skills such as participation, discovery, decision making and problem solving were achieved. According to these properties, model, borderline and contrary cases were discussed. The literature s views towards concept analysis of critical thinking, related concepts, background, defining attributes and results were determined, and model, borderline, and contrary cases were presented. Conclusion: It was determined that while some of the properties of critical thinking are related to personality traits such as intuition and curiosity, others are related to a person s education and can be developed by using oral and written language effectively, asking questions, and other scientific approaches.