Problem to be solved: to provide a sterilizing apparatus and sterilization method suitable for sterilization of liquid foods containing proteins.The disinfection device 4 has three plate-like electrodes arranged in parallel, the central electrode 10A connected to the high frequency power supply 11, the left and right electrodes 10B and 10C grounded, and between the electrodes 10a and 10B and the electrodes 10B and 10C, Teflon insulators 12 and 12 are disposed closely.The electrode 10B has a circular hole 13b serving as an inlet of the liquid food, a long hole 13D serving as a flow path in the insulators 12 and 12, a circular hole 13A for connecting the flow path to the electrode 10a, and a circular hole 13C serving as an inlet of the liquid food in the electrode 10C.Diagram【課題】たんぱく質を含む液体食品の殺菌に適した殺菌装置と殺菌方法を提供する。【解決手段】殺菌装置4は3枚の平板状電極を平行に配置し、中央の電極10aは高周波電源11に接続され、左右の電極10b、10cは接地され、電極10aと10b間及び電極10bと10c間にはテフロン製絶縁体12、12が密に配置されている。電極10bには液体食品の入口となる円形穴13b、絶縁体12、12には流路となる長穴13d、電極10aには流路連結用の円形穴13a、電極10cには液体食品の入口となる円形穴13cが形成されている。【選択図】 図2