Mushrooms Have Long Been Used For Medicinal and Food Purposes. Pleurotus Sajor- Caju Is Edible Mushroom Species. In Present Study, Pleurotus Sajor -Caju Was Cultivated on Wheat Straw And During Its Growth Various Doses of Indole 3 Acetic Acid (Iaa) a Plant Hormone at 10Ppm, 50Ppm And 100Ppm Were Sprayed In Mushroom Substrate. Thereafter Its Effect on the Growth and Yield of All Three Flushes Were Recorded. Results Showed That Iaa Was Able to Induce Stimulation In Growth and Ultimately Increase In Yield Is Also Recorded. Various Doses of Iaa Resulted In Increased Biomass Production From 14 to 30 With Reference to Control. This Study Suggest That Exposure of the Hormone to Substrate Can Be Important Tool to Increase the Production of Mushroom and Thereby Increase Nutrition Demand Can Be Fulfilled.