Professionals who work with children presenting intellectual and developmental disability (IDD) and developmental coordination disorder (DCD) are concerned with their motor development and their rhythmic perception. The aim of this study is to investigate the correlation between a motor performance test and a music rhythmic test that measures performance of rhythmic perception in tactile, auditory, auditory-visual, auditory-visual-tactile sensory conditions. Participants were 19 children, ten with intellectual and developmental disability (IDD) and nine with developmental coordination disorder (DCD), their age ranging between 5 to 12 years. The results confirmed numerous links between motor performance scores and rhythmic perception scores. These findings are in line with previous theoretical standpoints and empirical research. However, further research is needed to determine the exact relationship between suggested motor performance factors and rhythmic perception factors. (Contains 1 figure and 2 tables.)