The aim of this study was to determine the mediating role of loving in relationship between personality characteristics and marital satisfaction among married individuals in Mashhad. This study was a descriptive-correlational study. In this study, 344 married individuals in Mashhad, were selected through available sampling and they completed Love Attitude Scale (LAS), NEO-Five Factor Inventory (FFI) and Enrich Marital Satisfaction Questionnaire. Pearson’ s correlation, stepwise regression analysis and path analysis were used to analyze the data through SPSS and AMOS software. The results showed that there were significant correlations between personality characteristics and, eros, ludos, Storge, Pragma and Agape loving styles with marital satisfaction (p<0/01). Regression analysis also showed that eros style, neuroticism, Pragma style, ludos styles, agreeableness and extraversion predicted 34 percent variances of marital satisfaction. Results also revealed the mediating effect of eros, Pragma and ludos love styles on the relationship between neuroticism and extraversion with marital satisfaction (p<0/05). According to the findings, marital satisfaction is influenced by loving styles and personality characteristics.