Aim: The purpose of this study is to evaluate the possibility of incidental thyroid carcinomas during laryngeal surgery. Materials and Methods: Seventy three patients who were treated surgically for squamous cell carcinoma of larynx at the Otolaryngology Department of Ankara Oncology Education and Research Hospital, over 18 months period between 2003-2004 were included, out of which 4 thyroid carcinomas detected. Results: Among these patients with larynx tumor, one of them had follicular variant of thyroid papillary carcinoma, the other had thyroid papillary carcinoma metastases of cervical lymph node and the third one had thyroid papillary microcarcinoma and the last one had follicular thyroid carcinoma. Total thyroidectomy and contralateral neck dissection was performed to one of them and the other three patients had complementary thyroidectomy and contralateral neck dissection. All patients were free of disease after 11-9-17-11 months of follow-up respectively. Conclusion: Thyroid tissue must be evaluated carefully for thyroid carcinoma during laryngectomy. In our opinion, intraoperative evaluation of the thyroid gland is very important because coexistent of thyroid malignancy with laryngeal carcinoma can be more than it s expected.