To provide a stencil printing device of a multi printing drum type which can be reduced in size without complicating the path of conveying printing paper and without compromising the ease of maintenance, a plurality of printing drums are arranged along an inclined line of a prescribed angle of inclination, and the path of conveying printing paper between each pair of adjacent printing drums is defined, for instance, as a straight line. A plate making unit, a plate ejection unit and a paper feeding unit are arranged in the space defined above and below the inclined line along which the printing drums are arranged so that a compact design may be accomplished.