Abstract: An insert for a bed with a rigid support frame comprises a slat grating formed of spring slats extending transversely to the longitudinal axis of the bed. Each of the slats includes an upper and a lower strip of substantially equal length disposed on top of one another. The strips are spaced apart by elastic form bodies. Elastic support bodies are disposed below said lower strips for supporting the insert on the rigid frame. The support bodies are disposed below the ends of the lower strips and below the center of the for supporting the slats. Advantageously, the form bodies and support bodies at the ends of the slats are formed integrally as one piece.