Thirty-seven cases (67 sides) of chronic sinusitis treated with endoscopic sinus surgery (ESS) at the age of 8 to 17 years were evaluated in the paper. All the patients after ESS were followed up for a period of 2 to 24 months. Twenty-four out of 37 cases were primarily healed, 7 cases had delayed healing and 2 cases still had persistent inflammation during the period of follow-up. Among the 37 cases, 17 recovered completely and 20 recovered incompletely. The necessity, feasibility and indications of ESS in children were discussed.