Behavioural treatment of an adolescent girl with chronic stomach pain is described. The client was treated with a broad spectrum behavioural package including applied relaxation and coping skills. Results indicated considerable improvements in ratings of down-time, nausea, health, and mood. Moreover, she was nearly pain-free, and her activity and depression levels were substantially improved. The effects of treatment generalized to the natural environment and were sustained at a 9 month follow-up.