In this article, the relationship between religiosity and jealousy among married couples, religious and moral aspects are discussed. The sample of this research was selected from the Marmara Region, Istanbul, Kocaeli and Sakarya provinces between the ages of 1840 randomly selected 447 participants are married. In our society, the level of jealousy between married couples is high. Jealousy is the perception to determine, the gender of the individual place of residence, income and education level, occupation and type of marriage were taken into consideration variables such as. According to research findings, jealousy and religiosity has a positive significant relationship. Excessive jealousy has directed couples to do some acts forbidden by religion and has affected couples’ religious and morality life negatively. However, as a social expectation jealousy that isn’t excessive has been seen necessary for marriage