Choanal polyps are benign solitary masses, arising within the sinus and protruding into nasal cavity. The nomenclature is made according to the sinus that it is originated from. Sphenochoanal polyp (SCP) is quite rare, originates from sphenoid sinus, passes through the sphenoethmoid recess and elongates to nasopharynx and oropharynx. It may be confused with antrochoanal polyps on anterior rhinoscopy. Radiological examination with computerized tomography and nasal endoscopy are important in the differentiation of these two types of choanal polyps. Endoscopic approach for the complete removal of the SCP including its mucosa of the site of origin is extremely safe, which has minimal risk of recurrence. Herein we report a 30 years-old male patient with SCP, which was removed via endoscopic transnasal surgery. He had no recurrence at postoperative 9 months of follow-up.