PROBLEM TO BE SOLVED: To provide a more comfortable air mattress. According to an embodiment, an air mattress includes an air cell unit and a control unit. The air cell unit includes a first air cell and a second air cell. The controller can independently control the first internal pressure of the first air cell and the second internal pressure of the second air cell. The control unit changes the second internal pressure after the first operation of setting the first internal pressure to the first set internal pressure determined for the first air cell when receiving an input to change the second internal pressure. The second operation is performed. [Selection diagram] Figure 1【課題】より快適なエアマットレスを提供する。【解決手段】実施形態によれば、エアマットレスは、エアセル部及び制御部を含む。前記エアセル部は、第１エアセル及び第２エアセルを含む。前記制御部は、前記第１エアセルの第１内圧と、前記第２エアセルの第２内圧と、を独立して制御可能である。前記制御部は、前記第２内圧を変更する入力を受けた場合に、前記第１内圧を前記第１エアセルに関して定められた第１設定内圧にする第１動作の後に、前記第２内圧を変更する第２動作を行う。【選択図】図１
