The objective of our study is to determine the relationship between cyber addiction and temperament in a population of young students.

Our population was composed of 60 students belonging to 2 different colleges.

For data collection, we used:

1. - A data sheet containing demographic data, reasons for Internet connection …

2. - The test of Dr. Young to detect users suffering from an addiction to the Internet.

3. - The TEMPS-A: to assess the affective temperaments.

Our sample was formed by 60 students’ devised into 2 groups:

1. - 30 Students were cyber addicts.

2. - 30 Students witnesses.

The mean age was 22.6 years, with extremes ranging from 19 to 30 years.

The reasons for connection to the Internet were in:

1. - 43.3% to deepen knowledge.

2. - 28.3% as a hobby.

3. - 16.7% to expand the circle of friendship.

Cyber addict's students had a cyclothymic temperament in 50% cases, 26% were hyper mood, 13% were anxious and 11% had a depressive temperament.

In our sample, cyber addiction was significantly correlated with cyclothymic temperament (p = 0.024).

Accordingly, patients suffering from Internet addiction should be given a specific addiction treatment and monitoring taking into account the temperament.