The present invention relates to a proximal anastomose device (1), which enables to perform proximal anastomoses to be performed on the ascending aorta (A) by providing bloodless area required without using side clamp in coronary by-pass surgery, essentially comprising a catheter (2) which has a hollow cylindrical body, a balloon (2.2) which is present on the body in a deflated form such that it will surround a part of the body at the distal end (2.1) of the catheter (2) close to the aorta (A), which enables the blood leakage from the aorta (A) to the outside to be eliminated by fitting completely on the aorta (A) wall by means of its flexible edges when it is inflated, at least one mouth (2.4) which is located at the proximal end (2.3) of the catheter (2) far from the aorta (A), and which provides an opening for inflating the deflated balloon (2.2) and deflating the related balloon (2.2) which is inflated, a carrier trocar (3) which has a hollow cylindrical body, the end of which close to the (A) aorta is sharp, which has a lumen in a diameter suitable for carrying deflated balloon (2.2) catheter (2) therein, and which enables to place the catheter (2) inside the aorta (A) after aorta (A) puncture, a punch (4) which is comprised of two separate semi-cylinders and which is attached to the catheter (2) body by connecting the related semi-cylinders, at least one blade (4.3) which is present on the surface of the punch (4) facing the aorta (A), and the diameter of which determines the diameter of the aortotomy to be opened.La présente invention concerne un dispositif d'anastomose proximale (1), qui permet d'exécuter des anastomoses proximales à effectuer sur l'aorte ascendante (A) en fournissant une zone exempte de sang requise sans utiliser de pince latérale en chirurgie de pontage coronarien essentiellement comprenant un cathéter (2) qui présente un corps cylindrique creux, un ballonnet (2.2) qui est présent sur le corps sous une forme dégonflée de sorte qu'il entour
