Abstract: The thermoactive wall and ceiling element is installed in walls of newly built and old buildings and serves for its heating and cooling. It consists of a closed casing (2) which for intermediately storing heat comprises a phase change material (3) which melts when accommodating heat and reversely delivers latent heat to the surrounding on solidification. A lamellar design (8) with sound-absorbing material (4) therebetween is hung on this casing in a thermally separated manner by way of a heat-insulating material. At the bottom the lamellar design (9) is closed by a perforated ceiling sheet [metal] (plate) (5) in a heat-conducting manner, and this sheet metal (plate) forms the viewed ceiling of the room. The lamellar design encloses a heating and cooling pipe which is outwardly formed by the lamellar design as one piece or is connected to it is a heat-conducting manner.