The present invention relates to an implantable 10 100 200 300 for treating heart valve regurgitation, the device 10 100 200 300 being configured to expand from a compressed state into an expanded state. The device according to the invention comprises a stent element 11 consisting of (i) an atrial anchoring stent- portion 12, and (ii) a valve-carrying stent-portion 14 being fixedly connected with one another, and a valve-element 18. The atrial anchoring stent- portion 12 has a balloon-like shape 13 and the valve-carrying stent-portion 14 has a cylindrical shape 15, such, that the valve-carrying stent-portion 14 is positioned intra-annular without contacting the annulus 70 of a native heart valve 66.
