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OBJECTIVE The purpose of this study was to retrospectively evaluate the postoperative results of partial glossectomy for early tongue cancer using a carbon dioxide laser (CO2 laser). BACKGROUND DATA CO2 lasers are frequently used for the excision or treatment of soft tissue in a range of diseases, including oral cancer, leukoplakia, mucocele, anomalies of the labial and lingual frenum, and peri-implantitis. MATERIALS AND METHODS We retrospectively reviewed 31 primary cases of early superficial tongue cancer that were treated using CO2 lasers. In this study, early superficial cancer of the tongue is defined as a T1 or T2 tumor (TNM classification, NOMO; type, superficial spread, or exophytic; depth, <5 mm). The lesions were stained with 10% Lugol's solution and excised with a 5- or 10-mm safety margin from the nonstained area or induration using a CO2 laser. The raw surface was covered with a polyglycolic acid sheet using fibrin glue spray (n = 23), sutures (n = 6), or both (n = 2). Five of the patients showed a bleeding tendency: 1 was taking warfarin 100 mg per day, 1 was taking 350 mg per day, 2 were taking aspirin 100 mg per day, and 1 was taking aspirin 200 mg per day. RESULTS There were no cases of postoperative bleeding. Regarding postoperative pain, all patients could stop taking analgesic drugs by 1 month after undergoing the operation. In regards to postoperative difficulty to swallow, all could start swallowing rice gruel 2 days after the operation. The surgical margin was unclear in two cases due to the thermal denaturation of the excisional margin. The 2-year local control rate was 100% and subsequent cervical lymph node metastasis rate was 6.5%. CONCLUSIONS In terms of recurrence, metastasis, postoperative bleeding, postoperative pain, and swallowing, partial glossectomy for early tongue cancer using a CO2 laser might therefore help improve the postoperative course.