The present invention relates to a medical bed. A conventional bed for patients causes inconvenience due to a wet bed sheet used for a bath being replaced with a new sheet or drying the sheet using a separate apparatus slowly. In order to dry a wet sheet on a rooftop or in sunlight, a person has to carry the sheet by oneself. But, the wet sheet is very heavy, causing a physical burden and inconvenience to return the dried sheet again. Accordingly, a medical bed according to the present invention is disclosed to solve these problems of the conventional bed. The medical bed comprises a bed frame, a support plate, a head unit, a body unit, a lifting unit, a lifting member, a water collection unit, and an angle adjustment unit. The bed frame has legs, plural loess bed units, and a separation preventive unit. Inner spaces and moving rollers are formed in the legs. The separation preventive unit is formed at both sides of the bed frame to prevent the separation of the loess bed unit. The support plate is installed on the loess bed unit for support. The head unit is installed at the support plate. The body unit extends toward the lower side of the head unit and guides up-and-down movement of the loess bed. The lifting unit extends toward the lower side of the body unit and includes an insertion unit, which is mounted on the upper side of an elastic spring and applies pressure to the inner space of a lifting member. In addition the lifting unit is installed while maintaining a certain height from a bottom surface. The lifting member is installed on a fastening bar and moves the lifting unit vertically. The elastic spring is arranged inside the lifting member, and an inlet for injecting and discharging pneumatic and hydraulic pressure is formed at the upper side of the lifting member. The water collection unit positioned in an inner space of the bed frame has both a sloped bottom surface and wheels installed at the right and left ends of the lower side thereof. The angle adj
