A fastening structure of electronic surgical device is provided. The electronic surgical device includes a metal tube. The fastening structure includes a base, a fastening sleeve and a nut. The base includes a joint end and a tunnel. The metal tube is allowed to insert into the tunnel from the joint end, and a radial groove is disposed at the joint end. The fastener sleeve sleeves the outside of the metal tube. One end of the fastener sleeve has a deformable portion, and another end of the fastener sleeve has a hook and an outer thread. The hook snaps the radial groove, and the deformable portion includes a plurality of strip plates which are disposed radially and alternately. Also, the strip plates are elongated along the axial direction of the fastener sleeve. When the nut is screwed in, the nut presses the strip plates to make the strip plates clamp the metal tube.本發明提出一種電子手術裝置之固定結構,電子手術裝置包含一金屬管,電子手術裝置之固定結構包含一本體、一固定套管與一螺帽。本體包含一連接端與一通道,金屬管可自連接端穿入通道中,連接端設置有一徑向凹槽。固定套管套設於金屬管外,固定套管之一端設置有一可變形部,固定套管之另一端設置有一卡勾與一外螺紋。卡勾卡合於本體之徑向凹槽,可變形部包含複數軸向環板,複數軸向環板間隔且環狀排列並沿固定套管之軸向延伸。螺帽壓縮固定套管之複數軸向環板,使內螺紋與外螺紋鎖合時第二區段壓縮可變形部而夾持金屬管。1‧‧‧電子手術裝置之固定結構11‧‧‧固定套管111‧‧‧可變形部111a‧‧‧軸向環板112‧‧‧徑向凹槽113‧‧‧外螺紋12a‧‧‧套筒121‧‧‧連接端121a‧‧‧卡勾13‧‧‧螺帽131a‧‧‧內螺紋14‧‧‧金屬管
