The objective of the study was the comparative analysis of areas of Internet behavior (use of Internet, relations and Internet Addiction) with regards to gender in seven years’ perspective. The study was conducted in two stages (2005 and 2012) among Polish students (N = 452). Results showed significant gender differences in the use of Internet. The use of Internet is no longer predictor of Internet Addiction in both men and women. The higher number of contacts limited to Internet was a predictor of Internet Addiction in both men and women, but lower self -esteem in women only. Men were more prone to Internet Addiction in comparison with women and this tendency is on the rise.