Researchers have concluded that religious beliefs and spirituality develop the ability to deal with negative feelings and behaviours. Religious beliefs give hope and self-esteem while reducing anger, guilt, anxiety, and depression. Therefore, mental healthcare professionals deal with combining religious and spiritual beliefs into various therapy processes. One of them; in cognitive behavioural therapy, it is accepted that people perceive the events as negative because of their negative beliefs about themselves and their environment. Thinking negatively about your own like that “I am not a good person”, “I am a worthless person”, “I don’t pass this exam because I am too inadequate” and thinking negatively about their environment like that “people can hurt me”, “people always lie to me”, “nobody can love me”, these harmful and dysfunctional thoughts may have begun to develop in childhood. Negative experiences over a person’s life might also lead to the development of negative personal perceptions. Negative core beliefs fed by negative events for many years may become permanent in the mind of the person. It is, here used alternative positive thinking instead of these negative thoughts in the therapy process. Religions are believed useful as an alternative thinking source. Many religious approaches and Islamic belief have alternative sources such as prayer, hope, moderation, self-esteem, patience, repentance, justice, tolerance, wisdom, gratitude, kindness, respect, courtesy and contentment to change dysfunctional and maladaptive thoughts by some. These values are thought useful for cognitive behavioural therapy process to restructure dysfunctional thoughts and beliefs. With this study, we aim to examine and give some samples how Islamic belief integrates into cognitive behavioural therapy.