An endoscopic surgical device comprising: a sheath having a pipe capable of delivering a liquid and insertable into a channel of an endoscope; a forceps section including a pair of forceps components disposed so as to protrude from a distal end cover provided at a distal end of the sheath and a bracket that supports the forceps components in an openable-closable manner; and an operable member that is connected to a proximal end of the forceps components, wherein the operable member opens the forceps components when the operable member is moved forward in a longitudinal direction within the pipe of the sheath and closes the forceps components when the operable member is moved rearward; characterized in that the endoscopic surgical device further comprises: a flow-path formation member that is fixed to a proximal end of the bracket and that is disposed near the distal end within the pipe of the sheath in a rotatable manner about a central axis of the sheath, wherein the flow-path formation member includes a recess disposed in a direction orthogonal to an opening-closing direction of the forceps components relative to the bracket and recessed radially inward, the recess forming a gap between the flow-path formation member and an inner peripheral surface of the distal end cover so as to constitute a liquid delivery hole. a sheath having a pipe capable of delivering a liquid and insertable into a channel of an endoscope; a forceps section including a pair of forceps components disposed so as to protrude from a distal end cover provided at a distal end of the sheath and a bracket that supports the forceps components in an openable-closable manner; and an operable member that is connected to a proximal end of the forceps components, wherein the operable member opens the forceps components when the operable member is moved forward in a longitudinal direction within the pipe of the sheath and closes the forceps components when the operable member is moved rearward; characterized in that the endoscopic surgical device further comprises: a flow-path formation member that is fixed to a proximal end of the bracket and that is disposed near the distal end within the pipe of the sheath in a rotatable manner about a central axis of the sheath, wherein the flow-path formation member includes a recess disposed in a direction orthogonal to an opening-closing direction of the forceps components relative to the bracket and recessed radially inward, the recess forming a gap between the flow-path formation member and an inner peripheral surface of the distal end cover so as to constitute a liquid delivery hole. a flow-path formation member that is fixed to a proximal end of the bracket and that is disposed near the distal end within the pipe of the sheath in a rotatable manner about a central axis of the sheath, wherein the flow-path formation member includes a recess disposed in a direction orthogonal to an opening-closing direction of the forceps components relative to the bracket and recessed radially inward, the recess forming a gap between the flow-path formation member and an inner peripheral surface of the distal end cover so as to constitute a liquid delivery hole.