A heating device includes: a heating member heating a recording medium; a pressure member forming a heating pressure portion between the pressure member and the heating member by coming into pressure contact with the heating member, the heating pressure portion passing through the recording medium; a tensioning member placed to face the pressure member across the heating member to provide a tension to the heating member; and a cooling unit cooling the pressure member, the cooling unit including: an air blower generating an air flow; a circulator circulating the air flow along the pressure member; and a group of protruding portions provided on the circulator to guide the air flow.