A charging device (100; 100A) comprising: a discharge electrode configured to charge a surface of an image carrier; a charging device body including an opening portion for charging, the opening portion being provided so as to surround the discharge electrode and be opposed to a surface of the image carrier across a longitudinal direction of the discharge electrode; a charging duct member (7; 7A) provided so as to surround at least the entire opening portion of the charging device body, the charging duct member (7; 7A) being configured to introduce and exhaust an airflow within the surrounded area; an intake unit configured to generate an airflow to be guided into the charging duct member (7; 7A); and an exhaust unit configured to exhaust the airflow guided into the charging duct member (7; 7A), chacterised in that: the charging duct member (7; 7A) includes an airflow wall forming unit (32, 33) for directing the airflow from an upstream end in a rotation direction of the image carrier at the opening portion to a downstream end in the rotation direction of the image carrier at the opening portion so as to cover the entire opening portion with an airflow wall; an intake port of the charging duct member (7; 7A) communicating with the intake unit is divided into two, the intake ports communicate respectively with independent airflow paths formed independently in the charging duct member (7; 7A), one of the independent airflow paths of the intake ports is formed closer to the surface side of the image carrier to form the airflow wall, and the other independent airflow path of the intake ports is formed to merge an airflow with the airflow wall via the discharge electrode. a discharge electrode configured to charge a surface of an image carrier; a charging device body including an opening portion for charging, the opening portion being provided so as to surround the discharge electrode and be opposed to a surface of the image carrier across a longitudinal direction of the discharge electrode; a charging duct member (7; 7A) provided so as to surround at least the entire opening portion of the charging device body, the charging duct member (7; 7A) being configured to introduce and exhaust an airflow within the surrounded area; an intake unit configured to generate an airflow to be guided into the charging duct member (7; 7A); and an exhaust unit configured to exhaust the airflow guided into the charging duct member (7; 7A), chacterised in that: the charging duct member (7; 7A) includes an airflow wall forming unit (32, 33) for directing the airflow from an upstream end in a rotation direction of the image carrier at the opening portion to a downstream end in the rotation direction of the image carrier at the opening portion so as to cover the entire opening portion with an airflow wall; an intake port of the charging duct member (7; 7A) communicating with the intake unit is divided into two, the intake ports communicate respectively with independent airflow paths formed independently in the charging duct member (7; 7A), one of the independent airflow paths of the intake ports is formed closer to the surface side of the image carrier to form the airflow wall, and the other independent airflow path of the intake ports is formed to merge an airflow with the airflow wall via the discharge electrode. the charging duct member (7; 7A) includes an airflow wall forming unit (32, 33) for directing the airflow from an upstream end in a rotation direction of the image carrier at the opening portion to a downstream end in the rotation direction of the image carrier at the opening portion so as to cover the entire opening portion with an airflow wall; an intake port of the charging duct member (7; 7A) communicating with the intake unit is divided into two, the intake ports communicate respectively with independent airflow paths formed independently in the charging duct member (7; 7A), one of the independent airflow paths of the intake ports is formed closer to the surface side of the image carrier to form the airflow wall, and the other independent airflow path of the intake ports is formed to merge an airflow with the airflow wall via the discharge electrode.