An inspection device (30) for inspecting multiple openings (2h) formed on the skin-side sheet (2) of an absorbent article so as to penetrate the skin-side sheet (2) in the thickness direction. The skin-side sheet (2) comes into contact with the skin of a wearer while covering the wearer with an absorbing body (3) for absorbing liquid from the skin side of the wearer when the wearer wears the absorbent article. The openings (2h) are formed by means of an opening formation device (10) disposed on the upstream of the inspection device (30) with regard to a transfer direction in which the skin-side sheet (2a) is transferred. The inspection device (30) has: an imaging processing unit (32) for imaging a region of one side of the skin-side sheet (2a), on which the openings (2h) are formed, before the skin-side sheet (2) is placed over the absorbing body (3) and for generating a set of data of the planar images of said region as a set of planar image data a binarizing processing unit (36) for performing a binarizing process when generating a binarized image based on the planar image data such that the region in which the openings are imaged among the planar images is included in an image specified by one of the binary values of the binary values in the binarized image and an anomaly determination processing unit (36) for determining whether or not there are anomalies in the openings on the basis of the binarized image.本發明之課題是提供一種,檢查吸收性物品之肌側薄片的開口部的檢查裝置等。解決手段,係檢查朝厚度方向被貫穿形成在吸收性物品之肌側薄片的複數個開口部之檢查裝置。前述肌側薄片,是在前述吸收性物品的使用時,從使用者的肌膚側覆蓋吸收液體的吸收體,且抵接在該使用者的肌膚的薄片。相對於搬送前述肌側薄片的搬送方向,藉由配置在比前述檢查裝置更位於上游側的開口部形成裝置形成前述開口部。檢查裝置具有:攝像處理部,該攝像處理部係在比前述肌側薄片疊合於前述吸收體之前,對前述肌側薄片的片面中形成有前述開口部的區域進行攝像,而生成前述區域的平面影像的數據作為平面影像數據;二值化處理部,該二值化處理部係進行二值化處理,而使依據前述平面影像數據生成二值化影像之際,在前述二值化影像中藉由二值之中的一方的值所特定的影像含有前述平面影像中攝像到前述開口部的區域;以及異常判定處理部,該異常判定處理部係依據前述二值化影像進行前述開口部的異常的有無的判定。18‧‧‧控制部P1‧‧‧穿孔工程10‧‧‧穿孔裝置(開口部形成裝置)C10‧‧‧旋轉軸36‧‧‧影像處理部(二值化處理部、異常判定處理部、第1二值化處理部、第1異常判定處理部)32‧‧‧CCD相機(攝像處理部、第1攝像處理部)2s2‧‧‧裏面(非肌膚側面)P2‧‧‧層積工程3‧‧‧吸收體2s1‧‧‧表面(肌膚
