PURPOSE: To obtain a multi-color printer which is so designed as to set a process ranging from the attachment of a stencil sheet to plate cylinders to printing automatically and also easily to be matched to an image.

CONSTITUTION: The subject multi-color printing device is equipped with plate cylinders 10, 11 which can be attached to and detached from a printing cylinder 14 and a mechanism 21 which makes a plate feed process to the plate cylinders automatic and ensures that a sheet for a printing plate is sandwiched between the plate cylinders 10, 11, and further, adjusts the top and bottom of the printing cylinder 14 and the plate cylinders relatively.