Some 288 Nigerian high school male adolescents in two different age brackets were administered the perceived somatotype scale and the Tennessee self-concept scale to determine the trend of self-concept ratings among subjects differentiated according to perceived somatotype-self, ideal and self-ideal discrepancy. Series of one-way ANOVA revealed significant differences in global self-concept among the perceived somatotype-self (PSS), the perceived somatotype-ideal (PSI) and perceived somatotype discrepancy (PSD) groups. Univariate analyses showed that the PSS groups differ significantly in all dimensions of self-concept except moral-ethical dimension. The PSI groups differed significantly on all self-concept dimensions except the behavioural and the moral-ethical self subscales. This study, which also revealed that perceived-ideal somatotype and self-ideal somatotype discrepancy differentiated markedly among measures of self-concept, is consistent with those obtained from other parts of the world.