University of Mohaghegh Ardabili Journal of Family Relations Studies 2980-938X 6 3 2026 09 01 Structural Equation Modeling of the Role of Pornography Addiction in Predicting Marital Infidelity with the Mediation of Emotional Loneliness and Dysfunctional Sexual Fantasies 56 66 4009 10.22098/jfrs.2025.16950.1234 EN Mahmoud Zivari Rahman Assistant Professor, Department of Educational Sciences and Counseling, Sayyed Jamaleddin Asadabadi University, Asadabad, Iran. Somayeh Pour Mojahad Head of the Counseling and Psychological Services Center, General Department of Education, Hamedan Province Journal Article 2025 03 09 <strong>Objective:</strong> Marital infidelity is one of the major challenges in couples' relationships, and can be influenced by pornography addiction. This study aimed to examine the role of pornography addiction in predicting marital infidelity, with the mediating role of emotional loneliness and dysfunctional sexual fantasies.<br /><strong>Methods:</strong><strong> </strong> This study employed a descriptive, correlational design. The population comprised men and women with a history of marital infidelity who had sought counseling services at educational centers in Hamadan province. From this population, a sample of 320 individuals was selected via convenience sampling. Data were collected using Grubbs et al.'s (2010) Pornography Addiction Scale, DiTommaso et al.'s (2004) Loneliness Scale, Wilson's (1998) Sexual Fantasy Questionnaire, and Yeniceri and Kokdemir's (2006) Marital Infidelity Questionnaire. To evaluate the fit of the conceptual model, structural equation modeling (SEM) was performed using AMOS 24.<br /><strong>Results:</strong> The proposed model demonstrated acceptable fit (χ²/df = 3.57, GFI = 0.879, CFI = 0.623, RMSEA = 0.089). A significant direct relationship was found between pornography addiction and marital infidelity. Moreover, emotional loneliness and dysfunctional sexual fantasies significantly mediated this relationship.<br /><strong>Conclusion:</strong> Pornography addiction can have a severe impact on marital relationships. Addressing its psychological consequences, including emotional loneliness and dysfunctional sexual fantasies, is essential for developing effective prevention strategies and improving relationship quality among couples. https://jhrs.uma.ac.ir/article_4009_e29ebb9d437bbb150bd3e14b5ba14a6c.pdf