The present study was carried out during 2010and 2011seasons to evaluate the effect of dipping Kelsey plum fruits in different concentrations of ethephon (250,500,750 and 1000ppm) as post harvest treatment to hasten fruit ripening. The data showed clear that ethephon application increased both loss in fruit weight , decayed fruit and total loss in fruit weight than the control.Yet, higher concentration was superior in this respect furthermore these treatment reduced both fruit firmness and chlorophyll A,B but increased SSC, and total anthocyanin than the control. Also, that data presented that higher concentration (1000 and 750 ppm) gave a higher effect in this respect.