Marital communication is acknowledged as a crucial indicator of matrimonial quality, and has undergone studies in recent times with respect to its determinants. While existing literature has focused on the value of existential issues from four existential counseling theories in improving matrimonial quality, there is a dearth of experimental research to substantiate the effects of the existential issues on marital communication. This study aims to fill the gap and highlight the potential of the existential issues by investigating the effects of a psycho-educational training, based on existential issues, on marital communication, among Iranian women. For the present study, sixty Iranian married women were randomly selected for experimental and control groups. During five sessions, the experimental group received psycho-educational training based on existential issues. The results of the study show significant enhancements in marital communication of the participants.