Medical instrument

A medical instrument comprising:

• a handle device with a fixed handle part, a movable handle part, and a locking device, the movable handle part being manually movable relative to the fixed handle part between a non-actuated rest position and an actuated working position;
• a shaft that is elongate, the shaft having a proximal end releasably locked on the handle device by the locking device;
• an instrument jaw arranged on a distal end of the shaft, the instrument jaw being movable between an open position and a closed position by an actuation of the movable handle part;
• and
• a push-pull element that is elongate and guided axially movably in the shaft and which, for force and movement transmission, is operatively connected proximally to the movable handle part and distally to the instrument jaw,
• the locking device comprising an actuation element that is movable manually into a release position in order to release the locking, and a blocking element that is operatively connected to the movable handle part, the blocking element being movable into a blocking position in the actuated working position of the movable handle part, in which the blocking element interlockingly blocks mobility of the actuation element, the blocking element also being movable into an enabling position in the non-actuated rest position of the movable handle part, in which mobility of the actuation element is enabled.