According to an aspect of the present invention, there is provided a fixing apparatus including: a heat roller that includes: a heat source that generates heat to be supplied on a toner image formed on a recording medium; a cylindrical core; a rubber layer that is formed on the cylindrical core and includes a thermal-conductivity-enhanced rubber, the rubber layer having a thickness of Tg that satisfies 200 μm ≦Tg ≦600 μm and having a rubber hardness defined by JIS-A hardness of Hg that satisfies 40 degrees ≦Hg ≦80 degrees; and a fluororesin layer that is formed on the rubber layer, the fluororesin layer having a thickness of Tj that satisfies 80 μm ≦Tj≦300 μm and 2 Tj ≦Tg ≦10 Tj; and a pressure roller that presses the recording medium against the heat roller.