The invention relates to an air charging device which comprises a first air chamber, a first non-electric-control air valve, an inflator pump which can charge air to the first air chamber by using the first non-electric-control air valve, a start-up inflator pump and a first switch for opening the first non-electric-control air valve, and a switch circuit, the first switch of which is used for starting the inflator pump; wherein, the switch circuit is provided with a second switch which is turned on when the first switch is switched on. By adopting the structure, an eclectic air pump is integrated with a plenum chamber so as to form an integrated air charging device which can be directly charged with air to become a usable air charging device and is convenient for use and taking along.