An inflatable device comprises a first inflating chamber, an inflating pump, a first air valve, a first switch, a second inflating chamber, a second air valve, a second switch, a first pair of electronic contacts and a second pair of contacts. The first air valve and the inflating pump are used for inflation and deflation for the first inflating chamber; the first switch is communicated with the first air valve which can be started by the first switch in a mechanical way; the second inflating chamber can be inflated and deflated by utilizing the second air valve and the inflating pump; the second switch is communicated with the second valve which can be started by the second switch in a mechanical way; when the first pair of contacts are contacted, the inflating pump works along the first inflation direction by the first air valve or the second air valve, and when the second pair of electronic contacts are contacted, the inflating pump works along the second deflation direction opposite to the first inflating direction by the first air valve or the second air valve, wherein, by the control of the first pair of contacts and the second pair of contacts, the first switch and the second switch are capable of operating the inflating pump; the inflatable device of the invention is easy to be used and carried.