A printing device provided with a conveyer roller pair for holding sheet paper drawn out from a recording paper roll to feed the sheet paper forward or backward. The device includes a feeding roller pair disposed between the recording paper roll and the conveyer roller pair for drawing out the recording paper and feeding it to the conveyer roller pair and a color recording unit disposed downstream of the conveyer roller pair in the direction of conveyance of the recording paper for recording a color image on the recording paper that is being moved backward. A guide unit with pivotable guide member is disposed between the feeding roller pair and the conveyer roller pair for bending and guides the recording paper in an arc-shape at an acute angle. A reservation space is provided outside of the arc-shaped recording paper guiding path for accommodating the sagged recording paper therein.