Instrument for endoscopic surgery

Instrument for endoscopic surgery, with a housing having a grip element and a shaft-receiving element, the grip element having a fixed grip part and a pivotable grip part, and the shaft-receiving element being intended to receive and lock the proximal end of a tubular shaft, with a tool arranged at the distal end of the shaft, and with an actuation member being provided for the tool and extending through the shaft and being longitudinally movable therein, or with a slide piece acting on the actuation member, the actuation member engaging with its proximal end in the shaft-receiving element of the housing and being able to be coupled to the grip part mounted pivotably on the housing, in such a way that a pivoting of the grip part causes a longitudinal movement of the actuation member and an actuation of the tool, wherein the grip element of the housing is rotatable relative to the shaft-receiving element of the housing about a rotation axis extending perpendicular to the shaft.