The present invention is installed, connect the upper frame of the folding bed set consisting of multiple split into first and second cylinder 1 while the bent rod 90 to also be folded through an angle at least, be folded at an angle free from the lower intermediate frame set and this second set of bending load the lower frame that is installed connected to the second cylinder connection provided as a hinge portion and to, by bending the frame itself is geunyukbyeong patient lying in bed by a desired angle in the forward and backward also to automatically perform the up, down and back motion as well as the waist and legs, provided on the lower sides of the frame 3 and the fourth cylinder and its connection to the third and by a desired angle, respectively left and right sides of the fourth frame through the bending rod provided can be folded at an angle free, geunyukbyeong patient left side of the frame of the bed itself, and laying the is bent by a desired angle to the right, the body of the patient geunyukbyeong left, and to automatically perform an operation reverse to the right, to enable the patient to exercise the muscles of the body immovable geunyukbyeong patient body frame installed in the upper side of a bed or the like latex Ondol While lying on the mattress, and easily through the bed frame, will facilitate on a folding bed to be performed automatically.As a technical configurations, on top of a fold-away bed (100) set the upper frame 110 and the first and second intermediate frame set (130, 130 ), set the lower frame 140 is installed interconnected via a hinge portion 120, respectively, the first set of the intermediate frame the rod 130, the first and the second cylinder to the lower side of the 160, 170, 160 170 is provided in connection with each of the first and second bending load 190 200, the the first end of the bending rod (190) is installed to the upper frame connection ever be folded set 110, the second bent rod 200 includes a rotating shaft h
