Abstract: A sheet-driven type automatic drafting machine has a drive roller or rollers and a rotary drive mechanism connected to the drive roller or rollers, a Y-axis rail extending in the Y-axis direction above the drive roller or rollers, a line-drafting head movably mounted on the rail for movement along the rail and a head driver connected to the head for driving the head along the rail, a shaft positioned above the roller or rollers and parallel to said rail, a first press roller arm pivotally mounted on the shaft for pivoting around the shaft at a predetermined position thereon, a second press roller arm pivotally mounted on the shaft for pivoting around the shaft and for movement along the shaft, the press roller arms each having a press roller at one end thereof engagable with the drive roller or a corresponding drive roller when the press roller arms are pivoted toward the drive roller or rollers for pressing a drafting sheet therebetween and enabling the drafting sheet to be driven in an X-axis direction by t