The invention provides a sofa bed provided with memory sponge.The sofa bed solves the technical problems that an existing sofa bed is large, cannot be used in narrow space and is poor in practicality.The sofa bed provided with the memory sponge comprises a sofa seat, a backrest and a first cushion.The first cushion is fixed to the sofa seat, one end of the sofa seat is connected with a storage groove extending outwards, a second cushion is hinged to the storage groove, the upper end face of the second cushion is flush with the first cushion, the first cushion and the second cushion are both provided with the memory sponge, the backrest is obliquely fixed to the sofa seat, a storage cavity is formed in the bottom of the other end of the sofa seat, a third cushion is disposed in the storage cavity, and the third cushion is arranged in the storage cavity through a moving mechanism.The sofa bed has the advantage of being high in practicality.