PROBLEM TO BE SOLVED: To provide a Pd or Pt complex useful for treating bone diseases such as osteoporosis and osteocarcinoma and parenchyma located in the surrounding of bone-related diseases.SOLUTION: The complex or the like represented by formula (II), wherein M is Pt (II) or Pd (II), and a bisphosphonate compound, especially a bisphosphonate complex or its pharmaceutically acceptable salt are provided.COPYRIGHT: (C)2010,JPO&INPIT【課題】骨癌や骨粗鬆症のような骨疾患及び骨関連疾患の周囲にある柔組織の治療に有用なPdまたはPt錯体の提供。【解決手段】式II:[式中、Mは、Pt(II)又はPd(II)である]で示される錯体等、およびビスホスホネート化合物、特に、ビスホスホネート錯体、又はその医薬的に許容される塩。【選択図】なし