Screen-printing machine, screen-printing method, and method of forming electrode for solar cell

The present invention is a screen-printing method comprising: using a screen-printing machine provided with a screen-making plate having an opening that corresponds to a print pattern, a scraper, and a squeegee; using the scraper to fill the opening of the screen-making plate with a paste supplied to the upper surface of the screen-making plate; and then using the squeegee to push the paste out through the opening in the screen-making plate to a prescribed position on an object to be printed, whereby the paste is screen printed according to the print pattern on the object to be printed; the humidity inside the screen-printing machine being adjusted during the screen printing. A screen-printing method is thereby provided with which the printability of paste on a screen-making plate can be improved by controlling the moisture content in the paste.