The invention discloses an inflatable umbrella which includes an umbrella handle portion, a piston portion connected to the lower part of the umbrella handle portion, a rotating joint rotatably connected to the upper part of the umbrella handle portion, a gas control portion fixedly connected to the upper end of the rotating joint, an umbrella stand fixing part fixedly connected to the upper end of the gas control portion, an inflation supporting tube arranged at the outer periphery of the umbrella stand fixing part, and an umbrella surface arranged at the upper end of the inflation supportingtube. Two symmetrically arranged check valves are fixedly arranged at the upper end of the umbrella handle portion. And the check valves comprise comprises a check valve a conducting outward from theinterior of the umbrella handle portion and a check valve b opposite to the conducting direction of the check valve a. An air vent a of which the upper end is communicated with an umbrella stand joint and the lower end presses against the check valves in a sealed mode is formed in an umbrella surface connecting part. A spring a for closely pressing the check valves against the air vent is connected between the umbrella handle portion and the umbrella surface connecting part.