Background of Study: School age children have a growing need for privacy, autonomy and when separation fromtheir parents, children are most like adults emotionally. Children face transition such as entering schools, takingnew subjects, changing class rooms and teachers, making new friends, trying new activities etc. They also undergolosses, which are painful at times, at this stage of life, they lack the intellectual ability to understand pain like adultsand control it. Hence, they are more vulnerable because they have not developed the cognitive skills necessary tounderstand their problems and causes. This study was conducted to assess a study to assess the knowledge of primaryschool teachers regarding behavioural problems and their prevention among children in selected Government primaryschools in Chamarajanagar district with a view to develop an information guide sheet.Objectives of Study: To assess the knowledge of primary school teachers regarding behavioral problems and theirprevention in school children. To find association between knowledge of the primary school teachers regardingbehavior problems and their prevention with selected variables. To prepare an information guide sheet regardingbehavioral problems and their prevention in children for primary school teachers.Methods: The study involved descriptive survey approach, and non-experimental descriptive research design withpurposive sampling technique. To collect the data from respondents, a structured questionnaire was administered to50 primary school teachers who teach from 1st standard to 7th standards in selected Government Primary Schools ofChamarajanagar District following inclusion and exclusion criteria. The tool consisted 55 items regarding knowledgeassessment. The results were described by using descriptive and inferential statistics.Results: The overall mean knowledge score obtained by the respondents was 46.1% regarding common behavioralproblems among children. With regard to participants there is significant association between knowledge and selecteddemographic variables like gender (X 2=4.43) at 5% level. There is no significant association between demographicvariables such age (X 2= 0.45), religion (X 2= 0.18), respondent’s children age (X 2= 4.62), Educational qualification(X 2= 0.45) Teaching experience (X 2= 2.86), contact hours (X 2= 1.27), Identified students behaviours (X 2= 0.19)Educational programme attended(X 2= 0.19) and parent teachers association(X 2= 0.08)Interpretation and Conclusion: The overall findings of the study clearly showed that The overall knowledge scoresof respondents regarding behavioural problems is 46.1% and about 60% of respondents had inadequate knowledgeon behavioural problems. Hence information guide sheet may enhance the knowledge of Primary School Teachers Regarding Behavioural Problems and their Preventionamong Children