To provide a fluidized drier capable of preventing insufficient flowing caused by supply of objects to be dried.

The fluid drier is provided with a drying chamber A forming a dispersion plate 5 capable of carrying out venting, with a bottom having a plurarity of openings, and a chamber B positioned in a drying chamber A lower part. In addition, it is provided with at least one of a wall temperature measuring means 24 arranged outside of the drying chamber A for measuring a temperature of a drying chamber wall 16, a feed rate control means for controlling a feed rate of drying gas G to be supplied to an area A1 within a predetermined range to be supplied with the objects S to be dried or a whole of the drying chamber A in response to the temperature of the drying chamber wall 16 measured by the wall temperature measuring means 24, a temperature control means for controlling a temperature of the drying gas G, and a supply control means of the objects to be dried for controlling whether or not there will be supply of the objects S to be dried into the drying chamber A.