A total of forty eight (48). 16 weeks old (1.825 ± 0.06 kg) cocks were selected to assess the effect of cold aqueous extract of Moringa oleifera (MoALE) leaves on relative organ weight, semen quality and reproductive hormone of cocks. The cocks were randomly assigned to four treatments (n=12) at 0.00, 0.25, 0.50 and 0.75gramme of the extract per litter of water in a completely randomized design experiment over an eight week experimental period.The result of water quality analysis of moringa leaf extract showed that its vitamin C percentage was 12.73%. There were no significant differences (p> 0.05) in the relative organ weight (heart, kidney, gizzard, liver and testes) and hormonal profiles (Testosterone, Luitenizing Hormone (LH), and Follicle Stimulating Hormone (FSH)). However, there was significant (p<0.05) increase in the sperm concentration (148. 00-162.00 x106/ml) with increase in extract administration.This study suggests that MoALE can be alternative source to improve sperm production and sexual functioning in cocks and oral administration of MoALE depict no detrimental effect on vital organs in the body. 1438622348.php