It also has antitumor activity superior, the invention provides a phosphine transition metal complexes novel few side effects. The following general formula phosphine transition metal complex novel of the present invention (1) (Wherein, A represents an alkylene group, an Shisubiniren group or a phenylene group, M represents gold, silver, platinum or copper atom, B 2 and B 1 can be coordinated to a covalent vital M and A, respectively The phosphine transition metal complex represented by A represents a heterocyclic group which may have a substituent group containing a trivalent phosphorus atom, C is a) represents an anion atoms.本発明は優れた抗癌活性を有し、また、副作用が少ない新規なホスフィン遷移金属錯体を提供する。本発明の新規なホスフィン遷移金属錯体は下記一般式(1)(式中、Aはアルキレン基、フェニレン基またはシスビニレン基を表し、Mは金、銀、銅または白金原子を表し、B1 およびB2 はそれぞれAと共有結合しかつMに配位結合しうる3価のリン原子を含む置換基を有してもよい複素環基を表し、Cはアニオン原子を表す)で示されるホスフィン遷移金属錯体である。
