The purpose of this study was to compare the basic motor abilities and school achievement of first grade elementary school boy's students who attended pre-school and those students who did not. This research is a causal-comparative study. Two-hundred students (100 with pre-school and 100 without pre-school) were chosen by stage random sampling. The instrument of this study was the basic motor ability test constructed by Arenhim and Sinkler (1974). The test of hypothesis at p<0.05 showed that: there were significant differences between the scores of the basic motor abilities and academic achievement students who attended pre-school and those who did not. Those attended pre-school showed better achievement. Therefore, it is recommended to provide situation for pre-school children to increase basic motor abilities under supervision of skill teachers.