The purpose of this study was to observe the level of Cellular phone addiction, as well as social support and mental health, of Christian teenagers, compared to non-Christian teenagers. 267 junior-high and high school students living in a city in Korea were sampled and questioned for this study. The results showed three main findings. First, Christian teenagers demonstrated less cases of Cellular-phone addiction than non-Christian teenagers. Second, Christian teenagers recognized a higher level of support by their parents than non-Christian teenagers. Third, there was not a statistically meaningful difference of mental health between Christian and non-Christian teenagers.