Palliative care has a critical importance in oncologic treatment and cancer pain treatment is an important part of the palliative care treatment program including physical, psychological, social and spiritual components. Most of the patients with cancer experience pain in any stage of their disease therefore pain treatment is a necessity in these patients. On the other hand, studies have shown that there is an insufficient pain treatment in cancer patients due to problems related with physicians or the patients. For this purpose, the principles and management of cancer pain heavily in the light of the current literature was aimed to be evaluated.