Day by day the use of image processing is increasing. Now a days image processing is the part and parcel of medical science. By image processing many types of cancer are easily detected. Skin cancer is one of them. In this paper the proposed method detects two types of skin one is cancerous skin and another is affected but not cancerous skin. Skin cancers are most common cancer in human. Skin cancers are curable cancer after early detection. The system can distinguish cancerous skin and non-cancerous skin based on some values of features. Some value extracted from Grey Level Co-occurrence Matrix (GLCM).