To provide a bed with an air massage function having appearance not different from that of an ordinary bed and also excellent in assemblability.

The bed 10 is constituted so that an air bag expanded and contracted by the supply and discharge of air is built in a mattress 11 and a notch part 24, through which the hose bundle 21 of air hoses connected to the air bag is inserted, is provided to a bottom panel 12 and an air supply and discharge device 17, which is connected to the connector 22 provided to the leading end of the hose bundle 21, is provided to the space 38 under the bottom panel 12. The opening 26 facing to the connection part 31 with the connector 22 of the air supply and discharge device 17 is formed to a side panel 13 and a door 27 is provided to the opening 26.