PROBLEM TO BE SOLVED: To provide an improved surgical instrument comprising an improved branch for use in open surgery, the surgical instrument being intended for laparoscopic and endoscopic surgery.SOLUTION: A novel branch (16) of an instrument (10) comprises a metal part (18), which is embodied in one piece seamlessly, and which comprises an electrode plate (19), an electrode support (20) and connection webs (21). Preferably, this metal part (18) is produced by a layered manufacturing method, for example selective laser melting (SLM). By eliminating welds or seams between the electrode plate (19) and the electrode support (20), connections, which conduct heat poorly and which simultaneously are mechanically very stable, can be created. The novel branch is suitable for instruments for open surgery as well as for flexible endoscopic and laparoscopic instruments.【課題】観血的手術で利用するための改良分枝体を備えた、腹腔鏡および内視鏡手術用の改良手術器具を提供する。【解決手段】器具（１０）の新規な分枝体（１６）は、電極板（１９）と電極受け（２０）と接合ウェブ（２１）とを有する、継ぎ目なしに一体化された金属部（１８）を備える。この金属部（１８）は、レーザ積層造形法（ＳＬＭ）などの積層造形方法で製造されることが好ましい。電極板（１９）と電極受け（２０）との間の溶接部または継ぎ目をなくすことにより、熱をほとんど伝導しない機械的に非常に安定した接合を確立できる。新規な分枝体は、可とう性を有する内視鏡器具や腹腔鏡器具だけでなく観血的手術用の器具にも適している。【選択図】図３
