The properties of the GDR in hot nuclei were investigated by measuring high energy &ggr;‐rays in heavy ion fusion reactions. It has been confirmed that the width of the GDR increases rapidly for Ex≥100 MeV and our previously introduced &Ggr;(Ex) can explain the data well for 80≤Ex120 MeV. The limiting temperature of the nucleus for existing of the GDR has been deduced for A∼70, 105 and 130, and it is concluded that the GDR disappears above the temperature of about a quarter of the resonance energy.