The earthquake of Ezgeleh with a magnitude of 7.3 was associated with a lot of aftershocks. In this research, the decay rate of the aftershock-sequence for events with the magnitudes larger than different threshold magnitudes ( Mc) is determined. The spatial and temporal windows is selected according to the Gardner-Konopov in a squares with a length of 2 degrees which is centered on the earthquake epicenter and for a time window of 50 days. The decay rates are calculated based on the decreasing rates of Omori, Reasenberg, Kisslinger, and Shcherbakov. The results of the decay rates graphs for each threshold magnitude show that the best fitted graph with data of aftershocks is a decay rate Omori for threshold magnitude greater than 2.5.