Two field experiments were carried out at the Experimental Farm of Rice Research& Training Centre, Sakha, Kafr-El-Sheikh, Egypt, during the two successive summer seasons, 2012 and 2013, to study the effect of rice husk as an organic fertilizer on the performance of two Egyptian rice cultivars. A strip plot design with three replication was used. Rice cultivars (Sakha 106 and   E. hybrid rice1) were occupied the horizontal plots .While four rates of fully grounded rice husk (0, 5, 7 and 9 Ton /ha) were devoted to the vertical plots. Growth, yield, yield components, and grains quality characters of two rice cultivars were investigated. The results showed that the mean values of all the studied characters except cooking and eating quality characters were significantly affected by rice cultivars. Different responses to rice husk rates were obtained for the all studied characters. In most cases, The mean values of these characters increased by increasing rice husk rates and maximized at the rate of 9.0ton /ha., and no significant was found between 7 ton/ha and 9 ton/ha, while, number of days to  50% heading and cooking and eating quality didn't affected by rice husk at any rate in both seasons. The interaction between cultivars and rice husk rates under study had significant effect on most tested characters, it was detected in two or/and one season of study. Meanwhile, this type of interaction was not significant regarding all grain quality characters in the two seasons of study. This study suggested that rice husk could be applied as organic fertilization (7 ton /ha) with 50% of recommended dose of nitrogen (72 kg N\ha).