A gurney transfer assist device for a helicopter has a fixed height frame supporting a slidably movable bed deck frame. The fixed height frame is releasably secured to a known wheeled gurney. The fixed height dimension raises a carried stretcher to a vertical height to allow transfer to and/or from a medical helicopter loading surface. The slidably movable bed deck frame is extendable outwardly from one end of the fixed height frame and the extending end is angulated to facilitate transfer of the stretcher and supported patient to/from the helicopter loading surface.