Aim: The study was aimed to evaluate some legumes plants in the diet on growth performances and carcass characteristics of Guinea pig feed on Pennisetum purpureum.

Method and Materials: A total of 48 females and 8 males-adult Guinea pigs aged of 5 months and weighing averagely 450±50g were used to the experiments. Females Guinea pigs were first put in breeding for a period of 31 days and then organized in a completely randomize blocks design into four groups of 12 females each. Each group received P. purpureum ad libitum and 20g DM/day/animal of a diet corresponding to the group.

Results: The results showed that the diet PP-DI has permitted to obtain the highest mean live weigh both at birth (86,00g) and weaning (181,88g). But, at a week eight, the highest mean live weight (347,42g) were obtained with treatment PP-AG.

Conclusion: It was concluded that diets containing legumes plants produce significantly higher total and daily weight, carcass characteristics and cecum weight.