Individuals have to communicate healthy with each other for being happy in their life. However, it always cannot be as expected. Sometimes university students' have difficulty about an interactive communication in social environment. This difficulty can be related to lots of factors. Some of them are individuals' happiness level, subjective well-being level, attachment style and also social anxiety level. The purpose of this study is to investigate the relationship between subjective well-being, attachment style, happiness in relationship and social anxiety. Scanning model is used in this research. This research was conducted on 305 students who were studying in Eskisehir Osmangazi University. The data was analyzed using SPSS 16.0. Results indicated that there is a significant positive correlation between subjective well-being and happiness in relationship. In addition, preoccupied, fearful and dismissing attached students' social anxiety level is higher than secure attached students' social anxiety level. Socially anxious student's level of subjective well-being is lower than the others. (C) 2010 Published by Elsevier Ltd.