A printing paper supporting table having an inclined and adhesive printing paper supporting surface is provided with printing paper peeling plates which can selectively project upward from the printing paper supporting surface and a gate member for preventing the downward movement of the printing paper at a lower edge of the printing paper supporting surface by projecting upward from the printing paper supporting surface, and a stencil master plate supporting member for supporting a planar stencil master plate is placed above and opposite to the printing paper supporting surface. Further provided is a pressure applying unit for pressing the printing paper supporting table against a stencil master plate supporting member. Thus, the feeding of printing paper to the printing paper supporting table, the positioning of the printing paper thereon, and the removal of the printing paper from the printing paper supporting table after printing can be conveniently automatized by using a simple structure without requiring any complex printing paper feeding mechanism or printing paper removing mechanism.