To provide an on-vehicle drying chamber efficiently drying wet clothes and shoes, or the like, and allowing for compact storage of them inexpensively.

The on-vehicle foldaway drying chamber 1 has two connection ports 11, 12 detachably connected with a blowing port 21 and an exhaust port 22 of an on-vehicle air conditioner respectively, introduces dry air from the blowing port 21 into the drying chamber, and is constituted so that wet air in the drying chamber is discharged from the exhaust port 22 to the outside of the vehicle.