Medical bed equipped with a frame and with a deck, this bed being further equipped: - with a device for adjusting the height of the deck with respect to the frame, this device comprising a deformable cross structure equipped with a head bar and a foot bar which are articulated with respect to one another; - with a head-up tilting device comprising: - a linkage mounted in an articulated manner between the head bar and the deck, between a folded position and an extended position, - an actuator controlling the movement of the linkage via the intermediary of a coupling, this bed being characterized in that coupling of the head-up tilting device can be disengaged and can adopt an engaged configuration in which the linkage is coupled to the actuator, and a disengaged position in which the linkage is decoupled from the actuator, and in that the bed is also equipped: - with a head-down tilting device comprising: - a connecting rod mounted in an articulated manner between the foot bar and the deck, between a low position and a high position; - a brake having a locking position in which it prevents the connecting rod from rotating with respect to the foot bar, and a release position in which it allows the connecting rod to rotate with respect to the foot bar, - with an emergency control system which comprises a control pedal and a mechanical transmission connecting the control pedal to the head-down tilting device and to the head-up tilting device, the control pedal being mounted so as to be able to move between: - an inactive position in which the pedal holds the brake of the head-down tilting device in its locking position and the coupling of the head-up tilting device in its engaged position, and - an active position in which the pedal releases the brake of the head-down tilting device and places the coupling of the head-up tilting device in its disengaged position. - with a device for adjusting the height of the deck with respect to the frame, this device comprising a deformable cross structure equipped with a head bar and a foot bar which are articulated with respect to one another; - with a head-up tilting device comprising: - a linkage mounted in an articulated manner between the head bar and the deck, between a folded position and an extended position, - an actuator controlling the movement of the linkage via the intermediary of a coupling, - a linkage mounted in an articulated manner between the head bar and the deck, between a folded position and an extended position, - an actuator controlling the movement of the linkage via the intermediary of a coupling, - with a head-down tilting device comprising: - a connecting rod mounted in an articulated manner between the foot bar and the deck, between a low position and a high position; - a brake having a locking position in which it prevents the connecting rod from rotating with respect to the foot bar, and a release position in which it allows the connecting rod to rotate with respect to the foot bar, - a connecting rod mounted in an articulated manner between the foot bar and the deck, between a low position and a high position; - a brake having a locking position in which it prevents the connecting rod from rotating with respect to the foot bar, and a release position in which it allows the connecting rod to rotate with respect to the foot bar, - with an emergency control system which comprises a control pedal and a mechanical transmission connecting the control pedal to the head-down tilting device and to the head-up tilting device, the control pedal being mounted so as to be able to move between: - an inactive position in which the pedal holds the brake of the head-down tilting device in its locking position and the coupling of the head-up tilting device in its engaged position, and - an active position in which the pedal releases the brake of the head-down tilting device and places the coupling of the head-up tilting device in its disengaged position. - an inactive position in which the pedal holds the brake of the head-down tilting device in its locking position and the coupling of the head-up tilting device in its engaged position, and - an active position in which the pedal releases the brake of the head-down tilting device and places the coupling of the head-up tilting device in its disengaged position.