The study aims to investigate the relationship of School Effectiveness with regard to Community Participation at primary level of education. The objectives of the study were to identify the more-effective and less-effective schools, to find out the differences between more-effective and less-effective schools in relation to physical facilities, Head Master and Teachers’ performance and Students’ performance, to find out the relationship between the school effectiveness and community participation. The descriptive survey method was used to carry out this study. A Total number of 27 more-effective and 35 less-effective primary schools were included in the sample of the present study. And also all principals of selected schools and 5 community members from each locality of these schools were selected incidental purposively, to investigate their participation in school activities. In order to collect data from the selected samples the School Effectiveness Schedule and Community Participation Interview Schedule were developed by the researcher. On the basis of the findings of the present study it is revealed that the schools having better Physical facilities, HM and teachers’ performance and Students’ performance were identified as more-effective schools. It is essential to identify schools which are less-effective and provide necessary help to develop their physical facilities and other aspects so as to develop the performance of students in order to increase school effectiveness. One of the significant findings of the present study is the higher community participation is associated with greater school effectiveness.