PROBLEM TO BE SOLVED: To provide a magnetic field generation applicator capable of highly efficiently and uniformly generating a magnetic field and used for a magnetic field generation apparatus.SOLUTION: This magnetic field generation applicator 10 of the magnetic field generation apparatus 1 impressing a high frequency magnetic field to a magnetism-sensitive heat producing body 3 indwelled in an affected portion 2a in a living body 2, is provided with a first core 22 around which a coil 24 is wound, a second core 23 provided in one end portion 22a of the first core 22, and a coating part 25 for coating the first core around which the coil is wound and the second core 23.COPYRIGHT: (C)2008,JPO&INPIT【課題】効率よく、一様に磁場を発生させることができる磁場発生装置に用いられる磁場発生アプリケータの提供。【解決手段】 生体2内の患部2aに留置された感磁発熱体3に高周波磁場を印加する磁場発生装置1の磁場発生アプリケータ10において、コイル24が巻回された第1のコア22と、第1のコア22の一端部22aに設けられる第2のコア23と、コイルが巻回された第1のコアと第2のコア23とを被覆する被覆部25とを備える。【選択図】 図5