Problems such as changes in people's lifestyles and standards and environmental pollution have seriously affected human health. It is known that many substances that people eat, drink, use in daily life and are exposed to are harmful to human health. At the beginning of these substances are the substances called “chemicals”. The use of these chemicals has accelerated with the development of industry and technology. It has been determined that many chemicals, which were previously considered harmless, cause diseases, irreversible damages and deterioration of the genetic structure over time. Cancer is one of the diseases caused by these chemicals. In the cancer statistics of 2020, it has been reported that there are 201 cases of cancer in every 100 thousand people in the world. Despite all the successes in the diagnosis, treatment and prevention of cancer in recent years; unfortunately, the war waged by scientists against cancer has not been fully won yet. In this study, the relationship between cancer and chemicals that are frequently used in daily life without being aware of it are discussed.