[Problem] To inspect the inner surface of a tubular body more easily and faster with high resolution, irrespective of the size of the tubular body. [Solution] A tubular body inner surface inspection method includes: a tubular body imaging device having an optical element for reflecting laser light applied from a laser light source in a circumferential direction of the inner surface of a tubular body as annular laser light, an area camera for imaging a region irradiated with the annular laser light to generate an annular beam image, and a coupling member for fixedly coupling the laser light source and the area camera; and an arithmetic processing device for performing image processing on the annular beam image. The area camera images a region where the annular laser light is not blocked by the coupling member in the entire field of view of the area camera while the tubular body imaging device is inserted into a tubular body and taken out therefrom, the region being a part corresponding to end regions that are
