Abstract: This study was conducted to evaluate the effects of the mixture of graded levels of Moringaoleifera and Ipomea batata Leaves Meal (MOIBLM) on the growth performance, carcass quality as well as haematology and serum biochemical indices of broiler chickens. A total of one hundred and eighty (180) day old Arbo acre broiler chickens were randomly allotted into four dietary treatments of forty five (45) birds each in a Completely Randomized Experimental Design (CRD). Each treatment had three replicates with 15 birds per replicate at MOIBLM inclusion level of 0%, 2.5%, 5%, 7.5% respectively. Data were collected on feed intake, weight gain and feed conversion ratio, carcass quality, haematology and serum chemistry. The birds were raised in a battery cage system where feeds and water were provided ad-libitumin an experiment which lasted for fifty-six (56) days. Data collected on Growth performance and blood parameters were subjected to analysis of variance and means were considered at p<0.05. The result revealed significant (p<0.05) differences in feed intake and weight gain of broiler chickens fed the experimental diet with experimental animals fed 2.5% inclusion level (T2) having higher weight gain and feed conversion ratio than others. There were also significant differences in the packed cell volume, heamoglobin, red blood cell, white blood cell, albumin, globulin and total protein across the treatments, but all are within the normal range for the experimental animal. Generally, the MOIBLM did not have any negative effect on the experimental animals throughout the period of the experiment. The study concluded that MOIBLM improved the growth performance and feed conversion efficiency of broiler chickens especially at 5% inclusion level. Therefore, it can be utilized by broiler chicken as partial replacement for soybean basal diet without adverse effect on their growth performance, heamatology and serum biochemical indices. It further recommended that MOIBLM meal at inclusion level of 5% and 7.5% would be beneficial for the health, and growth performance of broiler chicken. Further research is also recommended on the potentials of these test ingredients in animal feed formulation.