What are the effects of religion and religious affiliation (ties) on mental health of human beings? What empirical evidence can account for the positive role a religion or religious affiliation plays in mental health? To answer the aforementioned questions, the writer provides a clear account of current researches carried out, along with the titles and consequences as follows: A. Religious affiliation and suicide; the suicide rates among church goers have been found to be low or below the national average. B. Religious affiliation and crimes; there is a negative correlation between churchgoing and commiting crimes. C. Religious affiliation and narcotics (alcohol or drug adiction); the devout are less prone to drug addiction. D. Religious affiliation and a happy marriage; the most important factor in successful and happy marriages is believed to be religious ties. E. Roligious affiliation and depression; depressive illnesses are found to be more common among the non-believers or the non-religious than the devout. F. Religious affiliation and stress; the devout are less subject to mental abnormalitiy. G. An increase in union of kindred or strengthening bloodkinship brings about more social adaptation, and trust in God decreases anxiety and agitation.