Effect of inter and intra marriages on the mental health of the adults has been study by different people in different cultures by applying the David mental health inventory (MHI38) scale. In Pakistan this area of study was neglect, therefore researchers pay attention on it’s and conduct an empirical and scope able research.Methods: comparatative study design used in this quantitative approach. Form district Hari pur draw the sample of 300 participants. Sampling techniques was the simple random. Sample size consisted of (N = 150) both male and female and MHI 38 scale were used which is consisting of 38 items. Results:there by the results positive features of mental health higher in intra marriage rather than inter marriages family adults such as Life satisfaction Emotional and General positive effect scores were higher in intra marriages adults and negative features of mental health intensity level were higher in inter marriages adults such as Loss of behavior and Anxiety. Results of all mental health factors were significant at p = .0001 level. Conclusion: consequences of the study were indicated mental health of out side marriages family adults were better then within family marriages adults. This obviously declare inter marriages are the source for transferring the psychological syndromes in the new generation. By inter marriages psychological syndromes transferred in new generation rather then intra marriages.