PURPOSE: To provide a transportation method capable of transporting pipe almost without causing lowering of transportation efficiency and without marring the pipe.

CONSTITUTION: This is a method to transport a large diameter pipe 3 and a small diameter pipe 4 by inserting the small diameter pipe 4, which is smaller in diameter than the large diameter pipe 3, in the inside of the large diameter pipe 3, inserting a bag 2 in the gap between the large diameter pipe 3 and the small diameter pipe 4, making the inside surface of the large diameter pipe 3 and the outer surface of the small diameter pipe 4 contact closely with each other by way of bulging the bag 2 and putting the large diameter pipe 3 and the small diameter pipe 4 on a loading platform of a truck in this state.