Antrochoanal polyps were first documented in the 18th century. They represent one of the most common types of nasal polyps in children without cystic fibrosis. Only a few reports on children who had a history of snoring due to an antrochoanal polyp and only two cases where the antrochoanal polyp caused documented obstructive sleep apnoea (OSA) have been published so far. This report adds a third case of paediatric OSA induced by an antrochoanal polyp in a 12-year-old boy. After endonasal endoscopically-controlled polypectomy and a recurrence, transoral osteoplastic antrotomy in combination with endoscopic endonasal polypectomy eliminated the antrochoanal polyp and OSA was resolved. The authors have reviewed essential historical aspects about children suffering from snoring and/or OSA caused by an antrochoanal polyp.