Abstract: A water bed for supporting a body thereon and which comprises upper and lower flat plastic sheets. A first rectangularly shaped continuous peripheral wall extends between and is sealed to the upper and lower sheets to form a water chamber therebetween. The first continuous wall is formed by adjoining four endwise connected segments along four rectangularly spaced corner margin. Each corner margin is formed by heat sealing two adjacent wall segments in the form of an arcuate shape with a reinforcing strip disposed over the corner margin and lap sealed to the two adjacent wall segments. The upper and lower walls extend beyond the first continuous peripheral wall and have flaps which extend in a vertically disposed direction to form a second continuous peripheral wall. These flaps are also lap sealed to each other in order to form the second continuous peripheral wall which thereby forms an air chamber surrounding the water chamber.