A tire air pressure measuring device comprised of a first housing adapted for coupling with a valve stem of a tire. A valve pressure indicator is secured within a second housing. The second cylindrical housing couples with the first cylindrical housing. The valve pressure indicator has a needle extending outwardly therefrom. The needle extends through the first cylindrical housing to engage a contact point of the valve stem of the tire. A battery is secured within a third housing. The third cylindrical housing couples with the second cylindrical housing. The battery has wiring extending outwardly therefrom to electrically couple with the valve pressure indicator. A transmitter is secured within a cylindrical housing. The fourth cylindrical housing couples with the third cylindrical housing. The transmitter has a pair of wires one of which extends outwardly therefrom to electrically couple with the battery and another wire coupling with the valve pressure indicator.