According to statistical data in recent years, the number of Thai women who are married to foreigners has increased sharply. However, in the 2010 record by Thailand’s Ministry of Foreign Affairs, it is shown that only 40 percent of the Thai-foreign couples have successful marriages. To enhance an understanding about the tendencies of broken marriages, this study is based on the hypothesis that cultural barriers are an important factor which affects communication between transnational married couples. This research used two internet-based data collection methods: emailed questionnaire and the stories of life experience from a relevant website. The informants were four Thai-western couples. The research analyzed wife-husband communicative problems about contrasting collectivistic and individualistic cultural attitudes, as well as low-context communication and high-context communication. The key finding indicates that the couples’ unhappy marriages and ineffective of communication result from incompetence to communicate across cultures.