Swivelling adapter for installing TV sets vertically to a TV mount to save space. During travel, the TV set is turned into a vertical position and secured with a magnet in this position. This way, also large TV sets can be installed in a space-saving manner. To operate the TV set, it is simply turned 90° into a horizontal position. The adapter is universally applicable to sufficiently robust holders with VESA 100 mount. Rotation angle 93°, construction height 23 mm.