Lung cancer is the one of the deadliest disease in the world. Cancer is a disease in which cells develop out of balance in the body. Lung cancer is the primary cause of cancer mortality among both men and women in the United States, and the second most diagnosed disease. After decades of growth, lung cancer levels decrease nationwide, with fewer cigarettes being consumed. The most frequent source of lung cancer is cigarette-smoking. Lung cancer may also be induced by the usage of certain kinds of cigarettes. In this paper we propose a classification of predictive analysis through Deep Belief Network and K-Nearest neighbor (KNN) classifier.