Drought stress is a major constraint on wheat production worldwide. Organic amendments could be a possible option in semiarid climates to mitigate the adverse effects of drought at critical growth stages. Wheat straw biochar Three biochar treatments (BC0= 0 w/w (control), BC1= at 5% w/w, BC2= at 10% w/w) 3 drought treatments (D0-control, D1-dry at tillering, D2 -Drought was used in this experiment at the anthesis stage. Drought stress significantly reduced the growth and yield of wheat at critical growth stages, application of Biochar significantly reduced the harmful effects of drought by improving plant height (12.5%), Spike length (14.6%) ) ), grains per spike (13.89%), thousand-grain weight (9.4%) and biological yield (10.2%) compared to the control treatment Furthermore, physiological parameters such as water use efficiency (26.9% ), stomatal conductance (32,43). %), chlorophyll a (13.3%), chlorophyll b (14.24%), and transpiration rate (23.17%) were also improved by biochar application. In essence, using biochar at 10% w/w) rate could be a successful strategy to promote wheat grain production by reducing the hazardous impacts of drought stress.