To provide an instruction method for a cream solder printing device by which a manually measuring operation is not necessary even when no target mark is present on a screen or no substrate mark is present on a substrate and printing precision is not deteriorated, and further the improvement of printing workability and printing precision is achieved as well as a cream solder printing device.

A printed substrate 43 with a plurality of formed lands 67, 69 and the screen 47 for printing with a plurality of formed opening parts 71, 73 for the land are superposed over each other while the positions of the printed substrate 43 and the screen 47 are registered. Further, when no position registering mark is present at least either of the printed substrate 43 or the screen 47 for printing during printing a cream solder on the lands 67, 69 of the printed substrate 43 from the opening parts 71, 73 for the land, the position of the land as a substitute for the mark is automatically measured with the help of an identifying camera. Next, the positions of the printed substrate 43 and the screen 47 for printing are registered using the position of the land as a substitute for the mark.