The FN of mixed flours is presented in Fig 1. The control(0x WGF) showed the highest value(230 s) dnd the 12x WGF showed the lowest falling number(199 s). Results indicated that partial substitution of wheat flour by WGF decreased the falling number. The FN value determines the amylase activity in flour and is based on the degradation of gelatinized starch paste by amylase. FN decrease with the increase of substitute level, the lower FN of wheat-WGF composite flours as compared to control is due to the higher a-amylase existing in germ(Every et al 2002: Kruger, 1981) The production of wheat bread using a-amylase with higher vol ume and good crumb structure was previously reported(Randez al, 1995. Pritchard, 1992) The presence of amylases also increased the level of fermentable and reducing sugars in the flour and dough, thereby promoting yeast fermentation(Hamada et 2013, which suggested that w amylase activity might improve CSB quality