A bed for a child has a sack of a flexible material, which by a bottom rests on the floor and which has the mouth part thereof connected to a rectangular frame. The frame is formed of two frame parts, which are mutually connected via folding fittings that allow the frame parts to be folded into a parallel and overlapping relation. The frame is provided with one obliquely outward downward sloping leg in each corner. The legs are configured to fold back against the underside of the respective frame part in order to lie within the area of the frame part. The free end of the respective leg is connected to an adjacent bottom corner of the sack in order to facilitate the folding-out and collapsing, respectively, of the bag in connection with the erection and collapse, respectively, of the child's bed.