Effect enhancer of the anti-cancer agent

The subject of this invention is providing the effect enhancer of the anticancer agent for obtaining the outstanding therapeutic effect with respect to cancer. And the anticancer agent effect enhancer of the present invention, which is the solution, is characterized by comprising a nitric oxide donor as an active ingredient. According to the present invention, it is necessary to say that an effective treatment method has not yet been established for advanced cancer, which is one of the most difficult cancers for which chemotherapy cannot be performed. An excellent therapeutic effect for lung cancer can be obtained.