A medical device for causing hemostasis of a blood vessel for use through an endoscope, said medical device comprising: a handle ; a sheath device , which is attached to the handle ; a clamp device including a clamp base , in particular in the form of a sleeve, provided on a distal end of the sheath device and at least two clamp arms , in particular exactly two clamp arms; a control wire extending through the sheath device and reversibly movable in distal and proximal directions; and an actuator coupled to a proximal end of the control wire and actuable to reversibly move the control wire in the distal and proximal directions; wherein the clamp arms are each coupled to a distal end of the control wire and wherein the clamp device is actuable to open and close the clamp arms by a movement of the control wire such that a movement of the control wire in the proximal direction is translated into a closing movement of the clamp arms and a movement of the control wire in the distal direction is translated to an opening movement of the clamp arms ; wherein the clamp arms are coupled to the control wire by means of a pivot pin which is provided at a distal end section of the control wire and extends through corresponding through-holes provided in proximal end sections of the clamp arms , characterized in that exit-passages are provided in tail ends of the clamp arms , through which, after closing the clamp arms , the pivot pin can be pulled out of engagement from the through-holes and from the clamp arms spreading apart tail end sections of the clamp arms on opposite sides of the exit-passages without breaking them by a proximal movement of the control wire in order to uncouple the control wire from the clamp arms. a handle ; a sheath device , which is attached to the handle ; a clamp device including a clamp base , in particular in the form of a sleeve, provided on a distal end of the sheath device and at least two clamp arms , in particular exactly two clamp arms; a control wire extending through the sheath device and reversibly movable in distal and proximal directions; and an actuator coupled to a proximal end of the control wire and actuable to reversibly move the control wire in the distal and proximal directions; wherein the clamp arms are each coupled to a distal end of the control wire and wherein the clamp device is actuable to open and close the clamp arms by a movement of the control wire such that a movement of the control wire in the proximal direction is translated into a closing movement of the clamp arms and a movement of the control wire in the distal direction is translated to an opening movement of the clamp arms ; wherein the clamp arms are coupled to the control wire by means of a pivot pin which is provided at a distal end section of the control wire and extends through corresponding through-holes provided in proximal end sections of the clamp arms , characterized in that exit-passages are provided in tail ends of the clamp arms , through which, after closing the clamp arms , the pivot pin can be pulled out of engagement from the through-holes and from the clamp arms spreading apart tail end sections of the clamp arms on opposite sides of the exit-passages without breaking them by a proximal movement of the control wire in order to uncouple the control wire from the clamp arms. <EOS>