PROBLEM TO BE SOLVED: To provide a device and method for disinfecting grain seeds, capable of disinfecting the grain seeds simply in a short time and reducing effects on the environment.SOLUTION: The device for disinfecting the grain seeds is equipped with a ring burner 18 for forming a high-temperature space and grain seed-conveying means (12, 14, 16) for passing through the grain seeds in the high temperature space. The device sets at least one of the passing speed of the grain seeds, temperature of the high-temperature space and dimension of the high-temperature space related to the passing through direction of the grain seeds based on the germination rate of the grain seeds after passing through the high-temperature space and the disinfection rate of the grain seeds after passing through the high-temperature space.COPYRIGHT: (C)2011,JPO&INPIT【課題】環境への影響を低減し、簡易かつ短時間で穀物種子の消毒を行うことが可能な穀物種子の消毒装置及び消毒方法を提供する【解決手段】高温空間を生成するリングバーナ18と、前記高温空間内に、穀物種子を通過させる種子搬送手段(12,14,16)と、を備え、穀物種子の高温空間内通過後の発芽率と、穀物種子の高温空間内通過後の殺菌率に基づいて、穀物種子の通過速度、高温空間の温度、穀物種子が通過する方向に関する前記高温空間の寸法、の少なくとも一つを設定する。【選択図】図1