Today, cancer is appearing as a major unsolved health problem. Basicly, surgery, chemotherapy and hormone therapy models are used in the treatment of cancer. Basic procedures and drugs used in the treatment of cancer are thought to be insufficient. These treatments have some side effects and they take a long time. Due to the problems encountered in the treatment of cancer in the recent years, alternative methods of treatment are being researched. For this purpose the effect of herbal, synthetic and fungus organisms against various types of cancer is being investigated. As a result of these investigations, lichens and their secondary metabolites are also proposed to be used as an alternative method in cancer treatment. Lichens are a symbiotic association of a fungus and a photosynthetic partner. These metabolites were identified as fatty acids, lactons, zeorin, pulvic acid, petroleum, depsids, depsidons and antrokinon derivatives. Impact of lichen secondary compound studies on different human cancer types, aims to find a promising drug Candidate molecule.