In this research the metric characteristics of newly applied tests of motor skills were established on primary school pupils. The research was carried out on a sample of male and female pupils of 3rd and 4th grade of elementary school, which territorially belong to the urban area of Sisak and Moslavina County and were schooled in cities of Petrinja and Sisak. Altogether 327 pupils were involved in this research. The sample of variables consisted of 2 anthropometric variables (body height and body weight), and 4 tests for motor skills assessment (Shuttle run, Curl up test, Push up 90° test and Sit and reach test). In composite tests Cronbach’s varied from 0,939 – 0,978, which is considered to be a satisfactory level of reliability. Interclass coeffi cient of correlation (ICC) in these tests of motor skills was very high, ranging from 0,94 – 0,98. The coeffi cient of homogeneity was assessed by average correlation between items (AVR), and ranged from minimum value of 0,839 in the test Shuttle run to the highest value of 0,978 in the Sit and reach (left leg) test. The reliability in the Push up 90° test was r=0,74, and in the test Curl up was 0,63. In both tests, t – test results as a way of establishing homogeneity did not show statistically signifi cant differences. After the analysis, the tests Shuttle run and Sit and reach can be suggested as tests for motor skills assessment, unlike the Curl up and Push up 90° test are not recommended to use in this form.