A medical bed has developed, comprising a lifting unit extended to the lower body unit with an insertion unit mounted on an elastic spring for applying pressure to a lifting member, a water collection unit positioned at inner room of the bed frame forming sloped bottom surface, an angle adjustment unit installed at the bed frame for angular movement of the bed frame, a plural of the loess bed units, a separation preventing unit for preventing separation of the loess bed unit and a support plate for supporting the loess bed unit. The body unit extends the lower head unit and guides vertical movement of the loess bed. The lifting member installed on a fastening bar for controlling the lifting unit. The elastic spring is arranged inside of the lifting member, and an inlet-outlet for injecting and discharging pneumatic and hydraulic pressure formed at the upper lifting member.