A CCD camera is set under a print object having a registration hole, and a screen plate having a reference mark on its screen corresponding to the registration hole is arranged above the position of the print object. First, the amount of elongation of the screen is measured from a position of the reference mark in an unelongated state of the screen and that of the reference mark in a elongated state of the screen upon operation of a squeegee, and the shift amount between the registration hole and the reference mark is calculated from positions of the reference mark and the registration hole before printing This shift amount is corrected by the amount of elongation of the screen, and the screen plate is moved in response to the corrected shift amount to attain registration.