Objective: This research was made for screening the motor developmental status) fine and gross) of 4-60 months old children in Tehran city through Denver Developmental Screening Test II (DDST-II) and Ages and Stages Questionnaires (ASQ), comparing the results of two tests and determining their agreement coefficient.

Materials & Methods: In this analytical study the gross and fine motor developmental status of 197 children 4-60 months old were screened by using ASQ and DDST-II in 4 primary health care clinics in north, south, east and west areas of Tehran. Convenient sampling was used. Data was analyzed and consistency coefficient of two tests was determined.

Results: By using ASQ and DDST-II fine motor developmental delay suspected in %5 and 11.7% of children and gross motor developmental delay suspected in 3.6% and 11.2% respectively. The estimated consistency coefficient between DDST-II and ASQ for fine motor domain was 0.05 and 0.24for gross motor domain.

Conclusion: In this study motor developmental screening of children showed different results and kappa measure agreement of two tests was weak. For selecting a suitable tool it is necessary to compare the developmental screening results with a gold standard diagnostic test results of motor developmental screening be compared with a diagnostic gold standard test.