An image forming apparatus includes an image forming section, a paper supply section, a housing member and an ion generating unit. The housing member is disposed at least below the image forming section, and has the same shape in plane view as the image forming section and the paper supply section. The ion generating unit is contained in the housing member. The ion generating unit includes a duct forming a pathway that guides a flow of air that is sucked in from outside of the housing member, and that is discharged back outside of the housing member. An ion generating device is disposed inside the duct, along with a fan for generating an air current in the duct.