Abstract: A plastic mask unit for paste printing, which is capable of performing paste printing with superior quality for a relatively large number of times over a long life span, and also a method of fabricating the above-mentioned plastic mask unit. The plastic mask unit includes a mask frame and a plastic mask plate which is secured directly to the mask frame. The plastic mask plate can be formed with a plurality of slit-shaped through-holes for serving as a print pattern for paste printing, either before or after the plastic mask plate is secured directly to the mask frame.