PURPOSE: To clarify indication whether aeration drying is being carried out or hot air drying is being carried out and further to simplify setting of the loaded amount of grains.

CONSTITUTION: When aeration drying and hot air drying are carried out under a remote controlled operation, an aeration drying switch 56 of a remote controlling operation device 54 is operated, a displaying lamp 38 for displaying the loaded amount of grain is diminished, a displaying lamp 39 for displaying an aeration drying display is lit and upon completion of the aeration drying operation, the displaying lamp 39 is diminished and the loaded amount of grains is recovered to turn on the displaying lamp 38. With such an arrangement as above, according to whether the displaying lamps 38, 39 are lit or diminished, it is possible to know whether or not aeration drying or hot air drying is carried out and then resetting is not required by returning the amount of fed crop particles.