Since about thirty years, we observe the term of addiction in the landscape of the psychopathology, to designate different shapes of dependences: the addictions to alcohol, of the bulimia, or the tobacco addiction. However it is not always comfortable to establish to what this notion really makes reference. Under the conception of addiction we heard the dependences as well to substances psycho actives as well as the dependences to the pathological game, the compulsive purchase, the compulsive work, and the object of our survey the "cyber addiction". Effectively, the daily use of Internet doesn't necessarily imply that the topic becomes some dependent. On the other hand this daily use of Internet is a factor that encourages the apparition of addictives conducts. In this paper we investigate some possible correlations between this particular addictive behavior and depression.