Abstract: Feeding trials was conducted for 12 weeks to evaluate the utilization of processed soyabeans meal on the growth and nutrient utilization of Clarias gariepinus fingerlings. A control diet with no soyabeans inclusion (Diet 1) and 4 others with differently processed soyabean seeds supplements were formulated i.e. (Diets 2-5). Five isonitrogenous diets (control inclusive) with 35% crude protein were compounded, in all, The diets are: (1) The control, no soyabean inclusion and no processing (2) Autoclaving and Oven Drying (AOD) (3) Autoclaving and Sun Drying (ASD) (4) Oven Drying (OD) and (5) Sundrying (SD). Ten (10) fingerlings of Clarias gariepinus were stocked with average mean weight range of 2.80 gm-3.60 gm in each of the experimental plastic bowls, stocked in 26.9 litres of water. Fish fed on AOD and OD diets gave the best growth performance. Processing significantly affected mean weight gain at p<0.05. The fourth processing method (Sundrying i.e., the fifth diet) gave the least growth performance with poor growth and nutrient utilization which thus confirms sundrying as an unacceptable form of processing soyabeans. The choice of AOD as the best diet is confirmed, since it has the highest specific growth rate SGR (0.61), Protein efficiency ratio PER (0.392), Productive protein value (PPV (0.787) and least Food Conversion ratio FCR (7.31). The OD diet (which is the second best diet) is not significantly different from AOD p>0.05 with SGR (0.59), PER (0.378), PPV (0.657), FCR (7.70). The third ranking diet is the control. This suggest that utilization of soyabeans for fish diets in Clarias gariepinus is best if the processing method involves oven- drying.