PROBLEM TO BE SOLVED: To improve efficiency of a surgical operation by reducing a time to wash an electric knife.SOLUTION: A surgical apparatus 10 comprises an electric knife 200 a liquid injection knife 100 capable of injecting a liquid and an external case 50 which houses the electric knife 200 and the liquid injection knife 100 and has an opening 50a capable of projecting an electrode part of the electric knife 200. The liquid injection knife 100 operates to be capable of switching between a therapeutic mode for injecting the liquid to the outside of the external case 50 and a washing mode for injecting the liquid toward an electrode 210 for high-frequency treatment of the electric knife 200 housed in the external case 50.COPYRIGHT: (C)2015,JPO&INPIT【課題】電気メスの洗浄の手間を減らして、手術の効率を高める。【解決手段】手術機器10は、電気メス200と、液体を噴射可能な液体噴射メス100と、電気メス200と液体噴射メス100とを収容し、電気メス200の電極部を突出可能な開口部50aを有する外装ケース50と、を備える。液体噴射メス100は、外装ケース50の外側に液体を噴射する施術モードと、外装ケース50に収容された状態の電気メス200の高周波処置用電極210に向かって液体を噴射する洗浄モードとを切替え可能に動作する。【選択図】図4