The aim of this study was to evaluate the psychometric qualities of the scores of a Dutch version of Harter’s Self-Perception Profile for Children (SPPC) and to examine gender and grade differences. Participants were 760 Dutch-speaking Belgian fourth, fifth and sixth graders. Harter’s Teacher Rating Scale of Child’s Actual Behaviour (TRS) was used to test one aspect of the convergent validity of the SPPC scores. Factor analyses supported the five-factor solution of the SPPC and the TRS. The internal consistency values of the SPCC and TRS subscale scores indicate that each dimension could be reliably measured. Significant cross-informant correlations (convergent validity) were found for almost all subscale scores in all gender and grade groups. ANOVAs conducted on subscale means revealed significant main effects for gender and grade. Boys had higher scores on all subscales except Behavioural Conduct. Younger children scored higher on Physical Appearance and Behavioural Conduct. Physical Appearance was the best predictor of Global Self-worth for boys and girls and for each grade group.