Abstract: A combined bed and seat device for an infant is made of plastic material and is formed with various separately inflatable elements, namely a base (1) upon which the child sits or lies, a cushion (2) that surrounds the base (1) on three sides, an outer wall connected thereto and formed of wedge-shaped configuration in side view, and a second inflatable cushion (6) of approximately same circumference and connected to the other border of the outer wall (4). The cushion (6) forms the body that supports and stabilizes the bed upon the ground. In order to angle the base (1) into the seating position, the cushion (2) is clampable approximately in the middle of its length by means of an eyelet connection (5) against the second cushion (6). The inclination of the base (1) is adjustable by inflating the outer wall (4) to a lesser or greater degree.