Objectives: To know the incidence of hypocalcaemic tetany at post surgical state of total thyroidectomy. Methods: It was a cross sectional observational study among 50 patients who underwent total thyroidectomy in the Dept. of Otolaryngology and Head Neck Surgery, Sir Salimullah Medical College and Mitford Hospital & Dhaka Medical College Hospital during the period from January 2014 to December 2014. Results: In this study out of 50 patients 14 (28%) were male and 36 (72%) were female. Male to female ratio is 1:2.57. Maximum patients (34%) were in 4th decade. Among them 29 (58%) for multinodular goiter, 19(38%) patients for papillary thyroid carcinoma, 1 (2%) patients for medullary thyroid carcinoma and 1 (2%) and for Graves disease. 12 (24%) patients were presented along with cervical lymphadenopathy.