To suggest an advertisement promotion method using a distribution truck, etc., in which the production cost is reduced, advertisement with desired design can easily be produced and a signboard for advertisement can be produced by using various materials for signboard.

In the advertisement promotion method using the distribution truck, image receiving surfaces of water ink are formed on surfaces of materials 1(1) to 1(3) for signboard consisting of corrugated fiberboard, etc., desired advertisement information is printed here by using an ink-jet printer, a printed surface is protected by a surface protection layer and the signboards 10(1) to 10(3) are obtained. The signboards for advertisement are mounted on the side 14 of a van body of the truck 12 for distribution at an attachable/detachable state. Since the ink-jet printer is used, the initial cost such as plate cost which is a must in the conventional case is dispensed with and the signboards for advertisement can be produced by using inexpensive materials such as the corrugated fiberboard by using a ground processing agent and a surface processing agent, etc.