To provide an apparatus for inspecting sealing capable of performing individual inspection of a sealed package by an on-line system.

The apparatus for inspecting sealing for solving the problem is an apparatus for inspecting the existence of inferiority of the sealing in the sealed package ("sake" pack 60), and is characterized in that a cover part 22 for ensuring a covering region on at least the upper part sealing part 62 of the "sake" pack 60, a sensor installed on the cover part 22 and detecting a volatile component (for example, alcohol) from the "sake" packaged in the "sake" pack 60, and a pressing means 32 for pressing the "sake" pack 60, are equipped with it. In addition, it is preferable that the apparatus 10 for inspecting the sealing having such characteristics as this keeps the cover part 22 equipped with a clean air nozzle 26 capable of jetting a clean air for purging the covering region.