Air conveyor is to conveyor empty bottle by means of low air pressure to blow the hung empty bottles. This type of conveyor can easily convey empty bottles upwards or downwards to optimize the space. In addition, it won’t result in bottle toppling situation. This machine is equipped with air force adjustment by which the air force is adjustable. Moreover, it is equipped with the eliminator to reduce the noise. The air filter can be dissembled to be washed to save the cost. In addition, this machine is able to be equipped with the inverter upon request, which is easy for operators to adjust the air force in the control cabinet for each machine section.