In order to provide a coil device for a transcranial magnetic stimulator capable of further increasing the electric field strength of the head surface, a winding coil is placed on or near the head surface, and magnetic stimulation in the brain by electromagnetic induction A coil device for a transcranial magnetic stimulation device that generates a current by an induced electric field in a target region and stimulates a neuron, wherein the winding coil is disposed on or near the head surface. A surface lead wire portion, and a far head surface lead wire portion disposed away from the near head surface lead wire portion from the head surface, the near head surface lead wire portion and the far head surface lead wire portion； Is set such that the induction electric field strength is increased as compared with the peripheral region of the magnetic stimulation target region.頭部表面の電場強度をさらに増大させることができる経頭蓋磁気刺激装置用コイル装置を提供するために、巻線コイルが頭部表面上又はその近傍に置かれ、電磁誘導によって脳内の磁気刺激対象領域に誘導電場による電流を発生させてニューロンを刺激する経頭蓋磁気刺激装置のためのコイル装置であって、上記巻線コイルは、上記頭部表面上又はその近傍に配置された近頭部表面導線部と、上記頭部表面から上記近頭部表面導線部よりも離れて配置された遠頭部表面導線部とを備え、上記近頭部表面導線部と上記遠頭部表面導線部との間の距離を、上記誘導電場強度が上記磁気刺激対象領域の周辺領域に比較して増大するように変化させて設定した。
