Due to the lack of standardized tool to quantitatively assess mild motor problems of children, Quick Motor Problem Inventory (QMPI) was developed for evaluating motor abilities of children aged from 5 to 10 years. The QMPI contains 22 items for assessing reflex integration, muscle cocontraction/stability, balance, coordination and motor planning. This study investigated the psychometric properties of the QMPI. The results of this study indicated that QMPI has satisfactory test-retest reliability (ICC=.96), inter-rater reliability (ICC=.82), and acceptable concurrent validity. It is suggested to be used to detect neuro-motor deficits for children with mild motor problems followed by a comprehensive intervention program which addresses both motor abilities and motor skills.