This study was done to explain the pessimistic attitude toward remarriage in divorced women based on insecure attachment style and fear of intimacy. The present study was a descriptive correlational study. All divorced women in Tehran city in ۲۰۲۰ made up the population of this research, ۱۵۸ of them were chosen through a convenient and snowball sampling method from among the educational groups formed on social networking sites (Telegram and WhatsApp). Participants completed the attitude to remarriage and Fear of Intimacy Questionnaire and Adult Attachment Scale. The data were analyzed using Pearson correlation and multiple regression analysis, and SPSS۲۲ software. The results indicated that fear of intimacy had a positive and significant relationship with a pessimistic attitude towards remarriage (r = ,۲۰۴; p = .۰۱۰). Also, avoidant attachment style showed a positive and significant relationship with pessimistic attitude towards remarriage (r = ,۲۷۲; p = .۰۰۱). However, the relationship between anxious, insecure attachment style and pessimistic attitude towards remarriage was not significant. According to the findings, failure in the first marriage can create a pessimistic attitude towards remarriage in divorced women by creating a sense of insecurity in them and increasing their fear about intimate relationships with others.