A printing apparatus that recognizes a location of a substrate, which is a printing target, and performs printing. In one embodiment, the expansion assembly is coupled with a length of pipe that acts as a weight and has a length longer than the anticipated section to be expanded. The mask adhesive agent comprises 100 parts by mass of a thermoplastic elastomer having a tan \u03b4 peak temperature of \u221220 to 30 DEG C and 20 to 150 parts by mass of an adhesiveness-imparting resin. According to other embodiments, the present invention may include a tool box that may be secured to the back of the pick-up truck without the use of any additional tools or other structures or fasteners.