<p>A punch for forming a die-cut pattern in a sheet inserted into a slit includes a punch cutter and a base having a wall portion with which the sheet comes in contact, the wall portion being constituted of a rear wall portion extending from a frontal center portion to one side of the punch and an inclined wall portion extending rearward to the other side at of the punch an angle of 45 degrees with respect to a line extending from the rear wall portion. In the slit, a first positioning member having a ruler portion extending to one side and a second positioning member having a ruler portion extending to the other side are installed so that the ruler portions are each turnable around the punch cutter positioned therebetween.</p>
