The traditional theories behaviorism, cognitivism, constructivism and connectivism are regarded as essential theories of learning. However, transformational learning theory works with critical thinking in adult learning. This process is based on their experience and it is followed by the steps of thinking and transformation process in perspective in ten phases. In addition, for critical thinking, developing profound understandings regarding knowledge and skills in a certain domain is of high importance. Critical thinking, like transformative learning, requires continuous use or internalization of them rather than rote learning and retention of information. However, critical thinking is the mandatory skill for this transformative learning and change. This study aims to present critical thinking and transformative learning in a comparative way to analyse the relationship between them.