Background: Inter- parental conflict play an important role in adolescence behavior which has been escalating over the years and have dire consequences on psychological well-being and  academic performance on adolescents. Aim: was to assess the effect of Inter- Parental Conflict on psychological well-being and academic achievement among secondary school students at benha city. Design: A descriptive correlational  research design was used in conducting this study. Setting: The study was conducted at two secondary schools in Benha city (Umm Almuminin secondary school for girls and Qalubia National Bank secondary school for boys) from the total (5) governmental secondary schools in Benha city. Sample: A cluster sample with simple random technique (28)3who was chosen from the above mentioned setting  . Tools: Data was collected by using the following tools: 1^st tool A structured Interview Questionnaire: It consisted of two parts of Part I:  Socio–demographic data of students, Part II: Socio–demographic data of family. 2^nd tool Children's Perception of Inter Parental Conflict (CPIC) Scale , 3^rd tool  Psychological Well-being Scale and 4^th tool Academic Achievement Scale. Results: Nearly half of  studied students had moderate perception of inter parental conflict, more than one third had moderate psychological well-being and more than half had poor academic achievement . Conclusion: There is a highly statistically significant negative correlations between the total perception of inter parental conflict and total psychological well-being. Also between total academic achievement and total perception of inter parental conflict. On the other hand there is a highly statistically significant positive correlation between total psychological well-being and total academic achievement. Recommendation: Develop Psycho educational programs for adolescents about conflict resolution strategies and periodical workshops for school students to help them to cope with consequences of inter parental conflict & enhance their psychological wellbeing