the present disclosure relates to a minimally invasive surgical procedure device including a set for forming a modular surgical tool , the set including a carrier shaft and a plurality of functional modules , in which the each functional module has means for rigid connection to the carrier shaft and / or to another functional module and has dimensions suitable for insertion into the body of a patient through a trocar , wherein the device is characterized in that : — each functional module has at least one degree of rotational or translational freedom and / or a functional end - piece such as a forceps , hook or a scalpel , — the carrier shaft and / or the functional modules include means for actuating the functional modules according to the respective degree of freedom thereof and / or the respective function thereof , and in that the device includes an electromechanical interface capable of controlling the actuating of the assembled functional modules forming the tool .