A sealing element which is suitable to use, in a cooking device comprising at least one plate suitable for positioning a cooking vessel thereon for cooking process; at least one heater providing heat to the cooking vessel for the cooking process; at least one button for controlling the cooking process; and at least one hole provided on the plate for receiving the button; for prevention of leakage of a part and/or liquid part of foods through the hole upon being positioned at the hole, wherein the sealing element comprises - at least one body which has at least one opening extending longitudinally therein and at least one wall extending around the opening; - at least one upper flange located at a first side of the body so that at least a side of the upper flange is connected with the wall, having at least a first width which extends away from the wall in a horizontal plane, and suitable for being placed on an upper surface of the plate which is provided at a part thereof intersecting with the hole; the sealing element characterized by comprising - at least one lower flange which is suitable for being placed on a lower surface of the plate provided at a part thereof intersecting with the hole, which is located at the first side of the body below the upper flange so that at least one side of the lower flange is connected with the wall, and which comprises: • at least a first part in the form of an arc section having at least a first width in the horizontal plane, • at least a second part in the form of an arc section located opposite to the first part and having at least a second width in the horizontal plane that is larger than the first width, and • at least a third part which couples opposing ends of the first part and the second part. - at least one body which has at least one opening extending longitudinally therein and at least one wall extending around the opening; - at least one upper flange located at a first side of the body so that at least a side of the upper flange is connected with the wall, having at least a first width which extends away from the wall in a horizontal plane, and suitable for being placed on an upper surface of the plate which is provided at a part thereof intersecting with the hole; - at least one lower flange which is suitable for being placed on a lower surface of the plate provided at a part thereof intersecting with the hole, which is located at the first side of the body below the upper flange so that at least one side of the lower flange is connected with the wall, and which comprises: • at least a first part in the form of an arc section having at least a first width in the horizontal plane, • at least a second part in the form of an arc section located opposite to the first part and having at least a second width in the horizontal plane that is larger than the first width, and • at least a third part which couples opposing ends of the first part and the second part. • at least a first part in the form of an arc section having at least a first width in the horizontal plane, • at least a second part in the form of an arc section located opposite to the first part and having at least a second width in the horizontal plane that is larger than the first width, and • at least a third part which couples opposing ends of the first part and the second part.