Abstract: A transportable hyperbaric chamber which is generally cylindrical in configuration and has a manway opening at one end, the chamber being of sufficient length and diameter to receive an injured person. The chamber is adapted to be temporarily connected to a deck chamber or other emergency chamber to receive an injured person and to subsequently be connected to a hospital or other more permanent chamber wherein such person may be treated over a longer period. The chamber is mounted on a support platform which is vertically adjustable at various points in order to align the chamber with such deck and hospital chambers. A pressure safe chamber door is mounted interiorly of the chamber and is movable between a closed, sealed position and an open position wherein the door is fully out of the path of the manway so that an injured person may be transferred without obstacle.