Pain is present in many hospitalized children and this requires from every physician a constant attention to its recognition, evaluation and treatment. The semeiology of pain differs whether it is acute or chronic. Acute pain can be recognized from its various behavioural, motor and neurovegetative manifestations. Pain evaluation must be adapted according to age: autoevaluation procedures for children older than 5 years, behavioural scales for children younger than 5 years. One must know that there is an appropriate and efficient treatment for each stage of pain intensity. For a better recognition and management of pain in hospitalized children, the organization of teams specialized in the evaluation and treatment of pain in children is to be encouraged.