PORTABLE AIR VESSEL (PAV) is a Fresh Air Breathing System which can be used in polluted atmosphere caused by the vehicular traffic on roads. PAV is a cylindrically shaped pressure vessel which is made up of either Mild Steel or FRP. Fresh Air can be stored in PAV under compressed state. Unlike the breathing systems used by the under water divers, which has to be resent to the supplier for refilling, this PAV can be refilled at any petrol filling station or any other near place where an Air compressor is available to inflate the vehicle's tyres. A controlled outlet valve releases the Fresh Air at required comfortable pressure through tube/s which can be directly connected to the Air Conditioner duct for general breathing by the occupants of a four wheeler or individual nose mask/s may be used if required. Two wheeler riders can house the PAV on the carrier and draw the Fresh Air through nose mask/s and tube/s.