Abstract: This experiment was conducted to determination of organic matter degradability of urea treated canola straw using nylon bag techniques. Three rumen fistulaed Gehzel sheep were used. Experimental group were: untreated canola straw (control) and 4% urea treated straw 4 g samples of each treatment were incubated at time intervals (0, 2, 4, 8, 16, 24, 48, 96) h in the rumen. The results showed that organic matter degradability for untreated straw lower than treated straw and soluble fraction (a) decresed and slowly degradaed fraction (b) from 25.54-38.52%. In an overall conclusion treated canola straw by urea lead to increasing degradability for ruminants.