Abstract: The present invention discloses a device for automatically inspecting the acceptability of the inner diameter and bending of pipes of the type in which a cylindrical gage is inserted and forced to pass through the pipe to be inspected under the driving force of, for instance, compressed air. The pipe through which the gage passes from one end thereof to the other end is accepted, but the pipe in which the gage is stopped is rejected together with the gage. A pipe to be inspected is located by positioning first and/or second pipe positioning means into a predetermined pipe inspection position, and then firmly clamped by pipe clamping means. A cylindrical gage with a predetermined outer diameter and length is brought to the firing position by gage positioning means, inserted into one end of the pipe and forced to pass through the pipe under the compressed force admitted into the pipe behind the gage through gage firing means.