A charger includes three or more odd-numbered wire electrodes that extend along an intersection direction intersecting a movement direction of a photosensitive body and being along a surface of the photosensitive body, and are arranged along the movement direction; a center counter electrode facing a center wire electrode that is arranged at a center in arrangement of the odd-numbered wire electrodes, and including a first portion and a second portion that are arranged in a region on a side opposite to the photosensitive body with respect to the center wire electrode, with a gap formed in the movement direction; end counter electrodes facing end wire electrodes that are arranged at both ends in the arrangement of the odd-numbered wire electrodes, and being positioned at both ends of the arrangement of the odd-numbered wire electrodes to sandwich the wire electrodes; and an air guide plate that directs a part of an airflow sent to a region surrounded by the center counter electrode and the two end counter electrodes toward the gap between the first portion and the second portion.