A valve sparing aortic root replacement device for use in the operation for valve sparing aortic root replacement, which is a special operation aimed for the root of main aorta originating from the heart, or known as the 'David Procedure' in the literature, characterized by comprising: • an adjustable circle which provides positioning of the measurement legs around the aorta root by means of the adjustable diameter characteristic and which configures the positions of the aortic commissures (5.1) in different diameters and which provides coaptation simulation of aortic leaflets (5.2); • at least one circle screw (1.1) which provides the diameter values of said adjustable circle to be adjusted as desired and positioned on the adjustable circle ; • at least one measurement leg provided in connection to the adjustable circle and which provides the placement of the valve sparing aortic root replacement device, fixed to the aorta root by means of slit surgical tubes and sutures and which provides alignment of points where the sutures are passed through the graft and which provides preparation of the graft accordingly; • at least one slit surgical tube that secures the legs of the device placed in the operation sutures (3.3) used during the operation and placed in the aortic root guided by these sutures to the aortic root tissue at the level of the operation sutures (3.3); • at least one surgical tube stopper (3.2) that closes the open end of the slit surgical tube and compresses the operation suture (3.3) in tensioned position, in order to provide the operation sutures (3.3) to preserve their tensioned positions in the slit surgical tube ; • at least one cusp caliper placed on the top edge of said adjustable circle and positioned in an orthogonal manner to the aortic root and which can measure the height difference between the initial edge (the lowest level) and the free edge (the highest level) of each aortic leaflet (5.2) geometrically. • an adjustable circle which provides positioning of the measurement legs around the aorta root by means of the adjustable diameter characteristic and which configures the positions of the aortic commissures (5.1) in different diameters and which provides coaptation simulation of aortic leaflets (5.2); • at least one circle screw (1.1) which provides the diameter values of said adjustable circle to be adjusted as desired and positioned on the adjustable circle ; • at least one measurement leg provided in connection to the adjustable circle and which provides the placement of the valve sparing aortic root replacement device, fixed to the aorta root by means of slit surgical tubes and sutures and which provides alignment of points where the sutures are passed through the graft and which provides preparation of the graft accordingly; • at least one slit surgical tube that secures the legs of the device placed in the operation sutures (3.3) used during the operation and placed in the aortic root guided by these sutures to the aortic root tissue at the level of the operation sutures (3.3); • at least one surgical tube stopper (3.2) that closes the open end of the slit surgical tube and compresses the operation suture (3.3) in tensioned position, in order to provide the operation sutures (3.3) to preserve their tensioned positions in the slit surgical tube ; • at least one cusp caliper placed on the top edge of said adjustable circle and positioned in an orthogonal manner to the aortic root and which can measure the height difference between the initial edge (the lowest level) and the free edge (the highest level) of each aortic leaflet (5.2) geometrically. <EOS>