Abstract: A circumcision instrument includes a pair of body members displaceable toward each other to simultaneously cut the foreskin along a longitudinal or circumferential line of cut while simultaneously stapling together the skin and mucous layers of the foreskin along at least one stapling line generally parallel with the cut, thereby to reduce bleeding from a cut. In a first embodiment, a generally straight cutting blade is carried by a body member at one end of a pair of scissors-type arms for longitudinally cutting the foreskin, cooperating male and female staple members being removably mounted on opposed body members for simultaneously producing stapling lines on both sides of the cut. In a second embodiment, a pair of annular body members arranged concentrically about a penis are displaced together on opposite sides of the foreskin when folded concentrically back around one of the annular members, a circular stapling line being defined concentrically between a circular cut and the penis.