PROBLEM TO BE SOLVED: To provide an inspection device accurately and easily inspecting a filter cigarette bundle in a process of cigarette pack production on the basis of image processing. SOLUTION: This inspection device for a filter cigarette bundle comprises a ring light 52 lighting up the filter side end face of a cigarette bundle B in a package arbor 14 with a blue light when the package arbor 14 of a packaging turret 12 reaches just in front of the discharge position, a CCD camera 86 imaging the filter cigarette side end face through a reflecting mirror 80 and an image processing unit 118 treating the filter cigarette side end face image imaged by the CCD camera 86 and judging whether the filter side end face is good or not.