Abstract: Sweet Potato Meal (SPM) was used to substitute maize on weight for weight basis as a dietary source of energy for starter and finisher chickens. The SPM was incorporated at 0, 10, 20, 30, 40, 50 and 60% levels in both studies without adjustments for energy and protein. Ross broiler chicks obtained from a local hatchery were used for the studies. Three replicates of 15 chicks each were randomly allocated to each of the 7 treatments in a Completely Randomized Design (CRD) for the starter phase while the number of birds was reduced to 14 per group for the finisher phase. Parameters measured or calculated include feed intake, body weight gain, feed efficiency, feed cost, feed cost/kg wt. gain, mortality and carcass characteristics. The starter phase study was on 1 to 5 week-old chicks while the finisher study was on 6 to 9 week-old chickens. The trend of results in the two phases were similar and showed that weight gain, feed intake and total cost of raising birds decreased significantly (p<0.5) while the feed cost/kg wt. gain and feed: gain ratio increased (p<0.05). The control, 10 and 20% SPM diets gave similar feed efficiency. The control gave the best performance, though its performance was not different (p>0.05) from those of the 10 and 20% SPM diets. Dietary SPM levels had no adverse effects on mortality and carcass characteristics. It is concluded that SPM should not be included beyond 20% level when substituted for maize on a weight for weight basis without adjusting the dietary protein and energy.