In a multi-functional endoscope high-frequency knife including an insertion portion (1) and a handle portion (2), the insertion portion (1) includes an insulating tip (101) and a first electrode (102) having a needle knife function. And a second electrode (104) having an IT knife function, and an ejection head (105). The handle portion (2) includes a first slider (202), a connector (203), and an injection connector (204). ) And a second slider (206). The second electrode (104) has a hollow structure through which the first electrode (102) passes. The proximal side of the first electrode (102) is fixed to the distal side of the mandrel (110) via a mandrel connecting member (109). The mandrel (110) is connected to the first slider (202) of the handle portion (2) at the proximal side, and the handle portion (2) is moved in the axial direction by the first slider (202) to move the first electrode (102). Is moved in and out of the second electrode (104). The first electrode (102) having a needle knife function realizes functions such as rapid marking and mucosal dissection. The second electrode (104) having the IT knife function is provided with an insulating chip (101) on the distal side thereof, thereby realizing functions such as tissue detachment and hemostasis due to bleeding point cauterization. [Selection] Figure 1
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