The present study aimed at testing and exploring the psychometric properties of the Counselor Burnout Inventory (CBI) in Greek school counsellors. Two hundred school counsellors from all over Greece participated in the study. The confirmatory study revealed four dimensions of the Greek version of CBI; namely, exhaustion, deterioration in personal life, incompetence, and negative work environment. Adequate psychometric properties of the version were revealed as well. The results also showed a negative relation between age and three dimensions of CBI, imposing the need for special training offered to young school counsellors in order for them to cope effectively and early enough with the burnout syndrome.