To provide an air blowing device completely eliminating water adhered to the surface of a vehicle.

This air blowing device A spraying high-pressure air Z1 to the vehicle W moving on a conveyance line 30 includes a blower pipe 20 connected to an air feed source feeding the high-pressure air, a blow-out duct 10 with a blow-out port blowing out the high-pressure air fed in from the air feed source, which is connected to the blower pipe, and a retaining means retaining the blow-out duct 10. The blow-out duct 10 is retained above the conveyance line 30 by the retaining means so that the blow-out port is opposed to the conveyance line 30. The air blowing device A sprays the high-pressure air Z1 spreading substantially in a fan shape from the blow-out port of the blow-out duct 10 to the vehicle W moving on the conveyance line 30 to an obliquely rearward direction relative to the advancing direction (an X direction) of the vehicle W, and moreover, to a direction opposed to the advancing direction (the X direction).