An air blowing device of the present disclosure has a wall portion, a duct, a guide wall, and an airflow forming mechanism. The wall portion is provided with an opening periphery providing a blow outlet. The duct communicates with the blow outlet. The guide wall is provided in an inner wall of a downstream portion of the duct and has a wall surface having a shape protruding toward an inside of the duct. The airflow forming mechanism forms a flow of air along the guide wall such that the air flowing through the duct is blown out of the blow outlet while being bent along the guide wall. The opening periphery has a portion that communicates with a downstream side of the guide wall and that has a shape protruding in a blowing direction of the air, which is bent along the guide wall from the blow outlet.