A laparoscopic surgical instrument comprising: a manual gripping portion provided with two gripping members being movable and hinged such that each can perform an angular movement, configured to house a user's finger a work tool provided with two jaws being hinged with each other by means of a pivoting shaft, able to be handled by means of the gripping portion, an actuator mechanism capable of transmitting movement from the gripping portion to the work tool, wherein the actuator mechanism comprises two push rods, wherein the distal end of each of the push rods (6, 7) is hingedly coupled to a corresponding jaw and the proximal end is rotatably joined to a corresponding annular body capable of longitudinal movement, such that the push rods are capable of rotating by means of rotating wheel, and wherein each gripping member is coupled to a respective annular body by means of connecting rods, the gripping portion includes a third fixed gripping member configured to house a user's finger, being coupled to a support part wherein the two push rods (6, 7) are mounted, and located between the two hinged gripping members, the two gripping members being hinged to the third gripping member by means of a shaft, characterised in that each of the connecting rods (11, 12) being coupled through one of the ends thereof to an open portion present in the lateral wall of the annular bodies (9, 10), through which the end of the connecting rod (11, 12) is slidable, such that they enable the annular body and consequently the push rod associated with the respective annular body to rotate, and wherein a guiding system is included to perform the angular movement of each of the jaws, the guiding system being provided with a groove in the shape of a slot present in each of the jaws, in which a projection protruding from each of the push rods (6, 7) is slidable. a manual gripping portion provided with two gripping members being movable and hinged such that each can perform an angular movement, configured to house a user's finger a work tool provided with two jaws being hinged with each other by means of a pivoting shaft, able to be handled by means of the gripping portion, an actuator mechanism capable of transmitting movement from the gripping portion to the work tool, wherein the actuator mechanism comprises two push rods, wherein the distal end of each of the push rods (6, 7) is hingedly coupled to a corresponding jaw and the proximal end is rotatably joined to a corresponding annular body capable of longitudinal movement, such that the push rods are capable of rotating by means of rotating wheel, and wherein each gripping member is coupled to a respective annular body by means of connecting rods, the gripping portion includes a third fixed gripping member configured to house a user's finger, being coupled to a support part wherein the two push rods (6, 7) are mounted, and located between the two hinged gripping members, the two gripping members being hinged to the third gripping member by means of a shaft, characterised in that each of the connecting rods (11, 12) being coupled through one of the ends thereof to an open portion present in the lateral wall of the annular bodies (9, 10), through which the end of the connecting rod (11, 12) is slidable, such that they enable the annular body and consequently the push rod associated with the respective annular body to rotate, and wherein a guiding system is included to perform the angular movement of each of the jaws, the guiding system being provided with a groove in the shape of a slot present in each of the jaws, in which a projection protruding from each of the push rods (6, 7) is slidable.