The painting conservation department of the National Museum of Denmark has devised a transportable suction table for on-the-spot conservation of large sized paintings. There are several reasons supporting in situ conservation. Large paintings are normally integrated parts of interior decorations and their conservation must harmonize with the surrounding setting. Additionally, conserving a painting in its accustomed climate would reduce the possibility of trauma. Finally, to transport this type of painting in and out of a museum atelier, would involve rolling it up on a roller for both before and after conservation.