To provide a test traveling method and device for an inspection pig capable of running at the same speed as that at the time of running during pipeline inspection in actual work.

This test traveling method and device for the inspection pig in a test line for running the inspection pig and performing an operational test comprises: a gas charging process of charging gas into gas storage means for storing running gas as a propulsive power for running the inspection pig; and an inspection pig running process for running the inspection pig by using the running gas charged into the gas storage means as the whole or part of running gas for the inspection pig.