Craniometric ontogenetic data of crab-eating (Macaca fascicularis), rhesus (Macaca mulatta) and Japanese macaques (Macaca fuscata) are examined by logarithmic principal component analysis. The males and females of each species are shown to follow a common growth trajectory, which varies among the species. The growth trajectory of M. fascicularis is distinctive, reflecting relatively larger facial length, facial height and palatal length, and narrower interorbital breadth. The morphological difference between M. mulatta and M. fuscata is weaker than that between either of them and M. fascicularis. Adult sexual dimorphism of the cranium is less pronounced in M. fuscata than in the other two species, of which M. fascicularis attains the adult level of dimorphism earlier than M. mulatta. These differences among the three closely related species suggest male-male competition is relaxed in M. fuscata and more intensive in M. fascicularis.