Abstract: An air valve for an inflatable device, which includes a valve block having two downward locating plates, a valve cap detachably closed on the valve block, and a valve flap fastened to an inside annular flange inside the valve block and turned to close/open the air passage through the valve block, wherein the valve flap has a finger rod raised from a free flap portion thereof for the holding of the hand to turn the free flap portion of the valve flap downwards from a close position to an open position, enabling the free flap portion to be forced through the gap between the locating plates and then stopped at the locating plates in the open position.