The Automatic Patient Turner is the ultimate in pressure sore prevention by automatically, periodically, and alternately tilting, and then laterally turning an immobile patient from one complete side to the other in a manner similar to, yet gentler and less intrusive than, manual turning. This is accomplished by the patterned, sequential inflation and deflation of six strategically-placed inflatables. When the bent knees (1) are perpendicular and sandwiched between a pair of inflated knee inflatables (6 and 7), they can serve as a lever arm in the turning process. When pressure is exerted against the bent knees (1), it causes them to move well beyond their perpendicular position. They then descend in the direction of the turn as the knee inflatables (6 and 7) deflate. The descending knees laterally pull the entire body of the patient completely to the side of the turn as a back-support pillow (8 or 9) inflates.