A charging device includes: a charged body; a charging member that extends
parallel to the surface of the charged body, a charging voltage being
applied between the charging member and the charged body; a cleaning
member that is in contact with the charging member, and that moves in an
extending direction of the charging member to remove matters adhering to
the charging member; and an air introduction path that introduces airflow
flowing in one orientation with respect to the extending direction of the
charging member at a position along the charging member, the cleaning
member being in contact with the charging member in a case where the
cleaning member moves in the one orientation, and the cleaning member
being separated from the charging member in a case where the cleaning
member moves in an orientation opposite to the airflow in a state in
which the airflow is generated.