PROBLEM TO BE SOLVED: To provide an agent for cancer treatment and a prophylactic agent for cancer metastasis each acting as both a radiosensitizer and a migration inhibitor against metastasis, invasion, and seeding which need to be solved in solid cancers.SOLUTION: The migration inhibitor includes a compound having the activity of inhibiting the production of nitrogen monoxide (NO) and nitrogen monoxide synthetase (NOS) as an active ingredient.COPYRIGHT: (C)2011,JPO&INPIT【課題】固形がんで解決しなければならない転移、浸潤、播種に対する、放射線増感剤、遊走阻害を兼ねるがん治療剤、がん転移予防剤を提供する。【解決手段】一酸化窒素(NO)および一酸化窒素合成酵素(NOS)の産生抑制活性を有する化合物を有効成分として含有することを特徴とする。【選択図】なし