A multi-pen type plotter printer is disclosed in which a desired character or graphic pattern is produced on the monitor paper by a selected one of a number of pens (9) arranged on a carriage (1) in accordance with an information signal. A hammer (14) is slidably and pivotally disposed on the carriage (1) for actuating the selected pen (9) into contact with the surface of the paper for plotting while the carriage and the platen (3) are moved. A blade member (4) is pivotally disposed which has a dimension wider than the width of the effective plotting range and is rotated in either direction to rotate the pusher means (14) in the same relative direction so as to cause the pusher means (14) to move toward and away from the pen (9).