Objective : The purpose of this study was to investigate the relationship between sensory processing abilities and occupational performance skills of children with developmental disabilities and to identify those factors that affect occupational performance skills. Methods : Between June 2010 and February 2011, cross-sectional data were collected on 39 children with developmental disabilities at the National Rehabilitation Center, and at the developmental center of Chung-Nam disabled person's parents society in Dang-jin over Short Sensory Profile(SSP) and Assessment of Motor and Process Skill(AMPS). Results : Significant correlations were found between AMPS-motor skills and low-energy/weakness, AMPS processing skills and low-energy/weakness, and visual and auditory sensitivity for all subjects. The mental retardation group showed a correlation between AMPS-processing skills, SSP total score, and tactile sensitivity. The cerebral palsy group showed a strong correlation between AMPS-motor skills and movement sensitivity, and a correlation between AMPS-processing and auditory filtering. Pervasive developmental disability and other groups showed a correlation between AMPS-motor skills and lowenergy/weakness. Low-energy/weakness was significantly related with AMPS-motor skills. Conclusion : We found a difference in the relations between sensory processing ability and occupational performance skills among children with developmental disabilities.