Abstract: The present invention relates to medicine, more specifically to microsurgery and can find application both for dilating stenosed portions of tubular organs and blood vessels and for fixing the edges of holes in tissues or holding prostheses, e.g., when positioning occluding, valve, or filtering prosthetic appliances on parietal lesions or defects, as well as on inosculations of hollow or tubular organs. The invention makes possible extending the field of application and functional capabilities of the microsurgical fixing device, as well as to enhance its reliability and safety of its positioning. According to one of its embodiments the microsurgical fixing device appears as at least two springs each appearing as a cone frustum or a flat ring made from a Z-shaped bar that forms a closed loop. The springs are movably interconnected through the apices of zigzags which are situated on the same circle so as to provide reversible compression of the springs under the effect of external load.