An image forming apparatus includes: an image carrier; a charging member; a blast port that is provided in almost parallel with a longitudinal direction of the charging member; an air inlet that is provided on one of end sides in the longitudinal direction of the charging member; and a guiding passage that guides, to the blast port, the outside air taken in through the air inlet. A first guiding member is provided in the closest position to an air inlet side of the guiding passage. A second guiding member is provided in almost parallel with the longitudinal direction of the charging member in the guiding passage. A third guiding member is provided on the blast port side from the second guiding member in almost parallel with the longitudinal direction of the charging member in the guiding passage.