The purpose of the research was to find the effects of cyber bullying on students‟ academic achievement on their behavior. The objectives of the research were (1)To know about the level of cyber bullying in the students of higher secondary schools of Punjab.(2)To explore the possible effects of cyber bullying on student‟s behavior and academic achievement in the students of higher secondary schools of Punjab.(3)To find differences of effects of cyber bullying on students‟ academic achievement and behavior in terms of demographic variable in the student‟s s of higher secondary schools of Punjab.(4)To finds differences of effects of cyber bullying on the student‟s academic achievement and students‟ behavior in terms of their age.(5)To find differences of effects of cyber bullying on the student‟s academic achievement and student‟s behavior in terms of their class.(6)To find differences in the effects of cyber bullying on the student‟s academic achievement and students‟ behavior in terms of their area/location.(7)To find differences in the effects of cyber bullying on the student‟s academic achievement and students‟ behavior in terms of their parents‟ monthly income. Research was mix method . Multistage random sampling method was used Total 2160 students and 48 teachers from 6 districts were selected as sample .A questionnaire and Semi structured interview was developed by the researcher .Questionnaire and Semi structured interview was piloted Cronbach‟s alpha coefficient of reliability was 0.72, 0.70 and 0.73 . The data were analyzed using descriptive and inferential statistics result shows that Cyber bullying has more effects on students‟ academic achievement as compared to their behavior. There are no significant effects of cyber bullying on students‟ academic achievement and on their behavior in terms of their gender, area/location and class, their behavior in terms of their age and parents‟ income. The qualitative data obtained from teachers concludes that students are well aware of cyber bullying. Cyber bullying equally affects boys and girls of public sector higher secondary schools.