The purpose of the current study was to investigate differences of speed on reaction time with respect to cognitive loading between children with developmental coordination disorder (DCD) and typically developing children (TD) in Korea. Movement assessment battery for children-2 (MABC-2) was used to screen DCD and TD groups in 102 H elementary school students located in I Borough, South Korea. Among them, 6 children with DCD and 5 TD children participated voluntarily and were request to perform a pressing-button task as possible as quickly with four conditions (visual-simple reaction time, auditory-simple reaction time, visual-choice reaction time, and visual-discriminate reaction time). An independent-sample t test and One-way repeated measures analysis of variance (p<.05) with a Bonfferoni post hoc test were conducted to exam differences regarding to types of sensory information and the numbers of stimulus-response choices in reaction time, respectively. As a result, reaction times in simple, choice, and discriminate reaction time task were prolonged in DCD, compared with TD. Significant differences were found in auditory-simple reaction time, choice reaction time with 3 visual stimulus-response choices, and discriminate reaction time with 2 visual stimulus-response choices between the groups. This result indicates that children with DCD showed longer time for processing information than TD and DCD and seems to need more time to process information from external environment for choosing appropriate responses. This present study suggests an experimental evidence to teachers and instructors when they plan classes for physical education or activity for children with DCD.