Abstract: An in vitro study was conducted to evaluate the effect of cellulases addition to banana wastes on dry matter (IVDMD) and organic matter (IVOMD) disappearances. Laboratory produced cellulase (Asperozym) and a commercial cellulolytic enzyme source (Bacillozym®) were added separately to banana wastes at 4 levels (0, 0.77, 1.54, 2.31 and 3.08 Unit/kg DM). Increasing the Asperozym levels up to 3.08 U kg-1 DM exhibited the highest (p<0.05) IVDMD and IVOMD, while Bacillozym® recorded the highest (p<0.05) IVDMD and IVOMD values at 1.54 U kg-1 DM compared with the untreated banana wastes (Control). Nine lactating Zaraibi goats (about 3 years old and weight on average 31±0.2 kg) after parturition were divided into three groups of three animals each, using 3x3 Latin square designs to evaluate the effect of Asperozym and Bacillozym® addition to diets on the productivity of lactating goats. Animals were fed on 50% Concentrate Feed Mixture (CFM), 25% banana wastes and 25% berseem (clover) straw (control diet). Control diet+ Asperozym at level of 3.08 U kg-1 DM (T1); control diet+Bacillozym® at level of 1.54 U kg-1 DM. (T2). Apparent digestibility for all nutrients were improved (p<0.05) by cellulases treatments. Milk and 4% Fat Corrected Milk (FCM) yields were higher (p<0.05) for T1 group followed by T2 group than control group while milk composition was not affected (p<0.05). Blood plasma Aspartate aminotransferase (AST) and glucose concentration were not affected by treatments. The addition of Asperozym and Bacillozym® to diets improved the performances of lactating Zaraibi goats with no deleterious effects on general health.