One of the most important issues in couples' relationships is their secrecy toward one another, the fact that lack of clarity of rules and ethics has led couples to justify their secrecy in common life. The purpose of this study is to provide criteria and introduce ethical indicators of secrecy in the couples common life. One, following the rules and relying the ethics may prevent undesirable concealment, its adverse effects and consequences and determine the duty of couples towards a moral life. The method used in this research is descriptive-analytical and library-based. The most important hidden moral criteria are the desirable work of observing ethical limits, considering the expediency of the spouse, the continuity and strengthening of the relationship and adherence to the marriage contract. Based on these criteria, moral indicators can be derived as: non-violation of moral teachings, non-conflict with ethics, benevolence and passage from personal interests, maintaining trust and self-confidence, and establishing reconciliation, acting as a spousal and loyalty. Adherence to ethical principles and standards in marital relations has the moral justification of couples' secrecy and will have favorable consequences.