As for the coating device, the coating room (94) spraying doing the liquefied binding material in the grain which inside is conveyed, the coating unit which covers the binding material in the grain (A) and the adhesion room (67) adding the cladding material of the powder to the grain which inside is conveyed, while the adhesion unit which makes the ambiguous condition cladding material binding material layer of the grain come in contact agitating (B) and the grain the dry room which it conveys (40) with the hot blast draft duct in order to supply the hot blast to the aforementioned dry interior (34) with the dry unit where it can provide the hot blast anti- air duct in order to discharge the aforementioned hot blast (C)It includes.コーティング装置は、被覆室(94)内を搬送されている穀粒に液状の結着材を噴霧して穀粒に結着材を被覆する被覆ユニット(A)と、付着室(67)内を搬送されている穀粒に粉状の被覆材を添加して穀粒の結着材層に紛状被覆材を付着させる付着ユニット(B)と、穀粒を撹拌しながら搬送する乾燥室(40)と前記乾燥室内に熱風を供給するための熱風送風路(34)と前記熱風を排出するための熱風排風路とが設けられた乾燥ユニット(C)と、を含む。