Provided is a superheated steam sterilization device capable of continuously performing sterilization treatment on a large amount of grains, and avoiding non-uniform exposure to superheated steam even when the amount of grains introduced is large. A superheated steam sterilization device according to one embodiment of the present invention is provided with: a horizontal tubular part having one end at which a supply inlet for supplying an object to be sterilized is formed, and the other end at which a discharge outlet for discharging a sterilized object is formed a rotating shaft part which is rotatably disposed in the horizontal tubular part, and includes a helical screw for moving the supplied object to be sterilized, and an stirring member having a plurality of stirring blades for stirring the object to be sterilized a plurality of superheated steam nozzles provided above the horizontal tubular part a superheated steam box which is provided above the horizontal tubular part, is partitioned into a plurality of sections in an axial direction, and is for temporarily retaining the superheated steam supplied from the superheated steam nozzle and a steam discharge outlet for exposing the object to be sterilized which is being moved or stirred in the horizontal tubular part, to the superheated steam retained in the superheated steam box.本發明之課題在於提供一種過熱蒸氣殺菌裝置,其係能夠進行連續性且大量之穀粒的殺菌處理,且即使大量投入穀粒,亦能夠消彌過熱蒸氣之照射不均。本發明之一實施方式之過熱蒸氣殺菌裝置,係具備:橫型筒狀部,係具有:形成有供給被殺菌物之供給口的一端、以及形成有排出殺菌處理物之排出口的另一端;旋轉軸部,係配置為能夠於橫型筒狀部內旋轉,並具備:用以移送被供給之被殺菌物的螺桿、以及具有攪拌被殺菌物之複數個攪拌葉片的攪拌構件;複數個過熱蒸氣噴嘴,係配置於橫型筒狀部的上方;過熱蒸氣箱,係配置於橫型筒狀部之上,並沿著軸線方向分隔為複數個區間,暫時儲存從過熱蒸氣噴嘴所供給的過熱蒸氣;以及蒸氣排出口,係用以將儲存於過熱蒸氣箱的過熱蒸氣,照射至在橫型筒狀部內移送、攪拌中的被殺菌物。1‧‧‧過熱蒸氣殺菌裝置2‧‧‧機框3‧‧‧橫型筒狀部4‧‧‧螺桿5‧‧‧攪拌構件6‧‧‧旋轉軸部7a~7d‧‧‧過熱蒸氣噴嘴8a~8d‧‧‧過熱蒸氣箱9a~9d‧‧‧蒸氣排出口10‧‧‧過熱殺菌部11‧‧‧供給口12‧‧‧排出口13‧‧‧供給滑槽14‧‧‧排出滑槽15a、15b‧‧‧軸承16‧‧‧驅動滑輪17‧‧‧驅動馬達18‧‧‧馬達滑輪19‧‧‧皮帶20‧‧‧穀粒冷卻部21‧‧‧架台22‧‧‧篩筒23‧‧‧旋轉軸24a~24d‧‧‧臂構件25a、25b‧‧‧長條狀攪拌翼26‧‧‧攪拌構件27‧‧‧螺桿28‧‧‧吸引風扇29‧‧‧供給口30‧‧‧排出口31‧‧‧旋轉閥32‧‧‧排出滑槽33‧‧‧驅動滑輪34‧‧‧驅動馬達35
