FIELD: respiration apparatuses. SUBSTANCE: gas pressure vessel includes one-piece molded mean portion joined at both sides with bottoms. Outer surface of mean portion of vessel has oval-shaped cross section with two wide parts and two narrow concave parts arranged mutually opposite in pairs or it has rectangular cross section. Attachment for joining bottoms with mean portion fastens both bottoms one with another through mean portion and it has rods with fastening members on their ends. Said rods are mounted along mean portion in openings arranged along perimeter of bottoms and they are passed in cavity of mean portion. Vessel includes unit for supplying gas having body with central duct and connected with it lateral duct connected with union of vessel; and valve. The last includes slide with through duct coaxial to central opening of body of gas supply unit. Gas quantity indicator of vessel is in the form of rod calibrated according gas quantity and mounted through elastic member with possibility of motion inside duct of slide. Cavity of vessel over lateral duct of body of gas supply unit is insulated relative to atmosphere. Gas inhalator includes respiratory gas unit and reservoir. Portable respiration apparatus includes jacket and gas reservoir being part of jacket. EFFECT: lowered cost of manufacture, enhanced ergonomic characteristics of vessel. 18 cl, 7 dwg
