An electric tool includes a casing (1), a handle (2) mounted on the casing, wherein an arcuated rail (11) is arranged after the casing, the handle includes a holding end far way from the casing and a matching part (12) adjacent to the casing and connected the holding end, the matching part adjacent to the casing is matched and connected with the arcuated rail after the casing, the handle matching part can slide on the arcuated rail to adjust the position of the handle relative to the casing. The electric tool also includes a locking device for locking the handle (2) on the casing (1). The locking device includes an inner buckle (13) and an outer buckle (32) respectively rotatably connected to the casing the electric tool. The inner buckle includes a connection pin (34) and an eccentric wheel (311). The outer buckle is provided with an eccentric wheel (321) and a chute (322), wherein the connection pin is slidingly arranged in the chute along the pin radial direction. The eccentric wheels (311, 321) contact with the handle surface and are pressed on the handle through rotation of the outer buckle and the inner buckle. The handle provided by the invention has a simple and practical structure.