A cutter apparatus includes a fixed blade, a movable blade that moves toward the fixed blade to cut a recording paper, a housing to which the fixed blade is attached, and a discharge port that discharges the recording paper. The discharge port includes a lower paper guide attached to the housing for guiding a lower side of the recording paper. The lower paper guide includes an inner guide part formed on an inner side of the housing toward a side of the fixed blade and the movable blade, an outer guide part formed on an outer side of the housing, and a support part attached to the housing.