Purpose: The purpose of this study was to examine stress and social support according to Internet addiction in juveniles. Method: Subjects were middle and high school students in Daegu (N=492). Data were collected using a self-rating questionnaire including demographic data, which was the Korean versions of an Internet addiction scale, a stress scale and a social support scale. Results: Stress and social support were significantly different according to Internet addition. Significant correlations were observed between Internet addiction and stress and between Internet addiction and social support. Conclusion: These results indicate that the more addictive to the Internet a student is, the more stress and the less social support he/she has. Therefore, further studies are needed to generalize these results and examine widely the effects of Internet addiction.