A descriptive study to assess the level of knowledge of parents on behavior problems of primary school children in Poonchery community area Kanchipuram (dist).The objectives were to assess the level of knowledge of parents on behavior problem of primary school children and to find out the association between levels of knowledge on behavioral problems of parents and the selected demographic variables of parents.  The mean value is 8.The study showed that 24.44 % of the samples had moderate knowledge, 24.44% had adequate knowledge and 51.1%  had inadequate knowledge.