An inflation device relates to the technical field of inflation equipment. The inflation device includes an inflation shell and a control main board. The inflation shell is arranged in an inflatable product, and is provided with an air outlet cavity; the air outlet cavity is provided with an air outlet; an inflation upper cover and the inflation shell are detachably and fixedly assembled; the inflation upper cover is provided with an air inlet end part; the air inlet end part passes through the inflatable product and extends towards the outer side of the inflatable product; the air inlet end part is provided with an air inlet; the air inlet communicates the air outlet cavity with the outside of the inflatable product. The inflation device using the above technical solution has the advantages of simple and convenient assembling, good leakproofness, high yield, high production efficiency, ingenious design, and easy maintenance.