The invention relates to a device for closing an atrial appendage, particularly the left atrial appendage, comprising a closing element, designed to be arranged in an atrial appendage entrance and to prevent an entrance of blood into the atrial appendage and/or a leakage of thrombus out of the atrial appendage, which is configured that it does not, in the implanted state, protrude out of the atrial appendage into the atrium of the heart; a first anchoring element, which is arranged adjacent to the closing element and connected to the closing element, wherein the first anchoring element is designed for an anchoring on an atrial appendage tissue wall, a connecting element which is at least in a radial direction flexible and connected to the first anchoring element and a second anchoring element, which is connected to the connecting element and designed for an anchoring on an atrial appendage tissue wall.