A pot experiment was carried out at Sakha Agricultural Research Station, Kafr El-Sheikh Governorate, during the growth season of 2005/2006 to investigate the effectiveness of Gibberellin (GA₃) in improving the salt irrigation water tolerance of barley (Hordeum vulgare L.) and its effect on barley plant growth and yield components.GA₃ significantly improve in shoot weight of barley plant by 30- 39 %, shoot fresh weight by 23-34 %, shoot dry weight by 22- 31 % and leaf area by 7- 26 % compared to unsprayed treatment. Also, spike length increased by 31 %, 100-grain weights by 8- 16 %, number of grains per spike by 22- 35 % and weight of grains per spike by 22 % compared to unsprayed treatment.