To provide a method and device for inspecting a bundled item of proper publications of bound volume and various kinds of accessories so as to detect excessive amount or lack of amount of accessories which shows no reduction in productivity in inspection and assures a high precision inspection (correctness).

There are provided a method for inspecting a bundled item and its inspection device 30, wherein a predetermined number of publications 10 of bound volume and their corresponding accessories 12 are overlapped and bundled to each other, an air cylinder 20 having an encoder is fixed on a binding line for transporting the bundled item 1, and the bundled item 1 is held through a descent of a rod 22a of the air cylinder 20 having an encoder to detect a thickness D and to detect an excessive amount or lack of amount of accessories 12.