A mattress structure is a mattress body and comprises: a fixed plate, which has a plurality of flexible accommodating holes and at least one first flexible member; a moving plate, which has at least one second flexible member corresponding to the flexible accommodating hole, the moving plate is below the fixed plate and has a distance with the fixed plate for moving; at least one lifting device, which is combined with the bottom of the moving plate, the moving plate and the second flexible member move up and down via the lifting device in order to let that the second flexible member penetrates through the flexible accommodating holes and protrudes out of the top surface of the fixed plate.