Electric motor dual drive for an adjustable support device for supporting a box spring mattress or an upholstered bed, which includes a frame and plate-like supporting parts pivotably adjustable relative to one another, and includes a fixed central supporting part, one end of which is articulatedly connected to an upper body supporting part pivotably connected around a horizontal pivoting axis. The other end of which is articulatedly connected to a leg supporting part pivotably connected around a horizontal pivoting axis. Dual drive includes a base on which two drive units are arranged. Each drive unit is drive-couple connected in the installation position of the dual drive with a pivot lever. The pivot levers are attached pivot-mounted to the base and disposed in operative connection with an adjustable supporting part to adjust the same supporting part and the dual drive is formed for toolless installation on support device.
