To inspect the winding dislocation of a battery and the bent status of a positive electrode lead highly accurately and efficiently.

Regarding an inspection system 100 for inspecting the dislocated winding of a battery 10 housing a wound group formed out of a strip type positive electrode plate and a strip type negative electrode plate wound via a separator in a battery can, a first photographing camera 312 for photographing the fluoroscopic image of the upper part of the battery 10 on the basis of the transmission or non-transmission of an X-ray through the upper part of the battery 10 carried to a preset inspection position P2, and a second photographing camera 316 for photographing the fluoroscopic image of the lower part of the battery 10 on the basis of the transmission and non-transmission of an X-ray through the lower part of the battery 10 are installed, and the dislocated winding of a wound group and the bent status of a positive electrode lead are inspected on the basis of the fluoroscopic images photographed by the first and the second photographing cameras 312 and 316.