An image forming device comprising: a transfer unit configured to transfer a toner image onto a recording medium being conveyed; a first heating unit that is arranged downstream of the transfer unit in a conveyance direction of the recording medium, wherein the first heating unit is configured to come into contact with the recording medium to heat the recording medium, and fix the toner image onto the recording medium, the first heating unit comprising a heating roll, which is configured to come into contact with the recording medium being conveyed to heat the recording medium, and a pressing roll, which is provided on a side of the recording medium opposite from the heating roll and is configured to press the recording medium toward the heating roll; a reversing unit configured to reverse front and back of the recording medium having a first toner image fixed onto a first surface of the recording medium by the first heating unit, and send the recording medium to the transfer unit; and a second heating unit that is arranged between the transfer unit and the first heating unit in the conveyance direction of the recording medium and is configured to heat the recording medium having a second toner image transferred onto a second surface of the recording medium, wherein the second heating unit is configured to heat the recording medium so that a temperature of the first surface of the recording medium having the first toner image fixed onto it is lower than a softening point of a toner, before the recording medium is heated by the first heating unit, wherein the pressing roll is configured to come into contact with the first surface of the recording medium when the recording medium having the second toner image transferred onto its second surface is heated by the first heating unit., characterized in that the pressing roll does not comprise a heater. a transfer unit configured to transfer a toner image onto a recording medium being conveyed; a first heating unit that is arranged downstream of the transfer unit in a conveyance direction of the recording medium, wherein the first heating unit is configured to come into contact with the recording medium to heat the recording medium, and fix the toner image onto the recording medium, the first heating unit comprising a heating roll, which is configured to come into contact with the recording medium being conveyed to heat the recording medium, and a pressing roll, which is provided on a side of the recording medium opposite from the heating roll and is configured to press the recording medium toward the heating roll; a reversing unit configured to reverse front and back of the recording medium having a first toner image fixed onto a first surface of the recording medium by the first heating unit, and send the recording medium to the transfer unit; and a second heating unit that is arranged between the transfer unit and the first heating unit in the conveyance direction of the recording medium and is configured to heat the recording medium having a second toner image transferred onto a second surface of the recording medium, wherein the second heating unit is configured to heat the recording medium so that a temperature of the first surface of the recording medium having the first toner image fixed onto it is lower than a softening point of a toner, before the recording medium is heated by the first heating unit, wherein the pressing roll is configured to come into contact with the first surface of the recording medium when the recording medium having the second toner image transferred onto its second surface is heated by the first heating unit., characterized in that the pressing roll does not comprise a heater.