This study examines the role of marital relations in shaping the dynamics of individuals’ terminal and instrumental values. As one of the most influential social institutions, marriage significantly affects personal development, value orientation, and behavioral strategies. The research highlights that harmonious marital relations—characterized by trust, emotional support, and constructive communication—promote the strengthening of humanistic terminal values, such as personal growth, family well-being, and self-respect. At the same time, stable and supportive relationships foster prosocial instrumental values, including responsibility, tolerance, honesty, and self-control. In contrast, conflictual or dysfunctional marital interactions lead to shifts toward individualistic and defensive value orientations. The findings emphasize the importance of marital quality as a key factor influencing value transformation and may serve as a basis for further studies in family psychology and practical guidance in marital counseling.