SolutionsThe plug coil has with the micro coil and the wire which is connected to the micro coil electrically long and narrow, the plug of the aneurysm where the plug coil is arranged in accelerates. The micro coil is formed with the 1st metallic materials which possess 1st restoration electric potential, is formed with the 2nd metallic materials which possess the 2nd restoration electric potential where the wire is smaller than 1st restoration electric potential of the 1st metallic materials long and narrow.< Selective figure >Figure 1【解決手段】塞栓コイルは、マイクロコイルと、マイクロコイルに電気的に接続される細長ワイヤとを備え、塞栓コイルが中に配置される動脈瘤の塞栓を加速する。マイクロコイルは第1還元電位を有する第1金属材料で形成され、細長ワイヤは第1金属材料の第1還元電位よりも小さい第2還元電位を有する第2金属材料で形成される。【選択図】図1