The  thyroid    gland  is  considered  to  be   a     highly   vascular   organ as it   receives  the   highest   quantity of    blood by volume (ie) five   milliliter of   blood   per   gram of   tissue. A midline structure,   it is   closely   related to    critical structures of  the neck. Among  the  endocrine glands,  the  thyroid  gland  has  an unique exceptional feature,  of  temporarily  storing  its  secretions before emptying into  the  blood stream¹. It  is  also  the most  common  endocrine  organ  to  undergo enlargement  from  a   normal   physiological   goiter to  a pathological  goiter. Thyroid   surgeries are   most   common   neck  surgeries;  hence  thorough  knowledge  of the blood supply of this gland to the surgeons is of immense importance to prevent any alarming  haemorrhage² So a  sound  and  precise  knowledge of the  arterial supply of  thyroid, is a  prerequisite for  surgical and  interventional  procedures of   neck. Though,  there are  innumerable  recent  advances  in  head and  neck reconstruction, a  number of  challenges are  encountered  by the  reconstructive surgeon. These  challenges  are  mainly  encountered    because  of  the  visibility of  this  region and  with   presence of   several  structures,  which  have  specialized   functions and anatomic  distinctiveness,  defects  are  difficult to  be  concealed there by,   indirectly increasing  the  demands of the   surgeons`s reconstructive  skills  with  greater emphasis on cosmesis³ . The  surgical  procedures  of  head  and   neck  that  involve superior  thyroid  artery  include, radical  neck dissection,   cricothyroidotomy, thyroidectomy, reconstruction of an aneurysm, carotid endarterectomy treatments for cancer,  diagnostic  and  therapeutic  catherization and  plastic   surgery.   The aim of  the present study, is  to  study the  possible  variation in  origin of  superior thyroid  artery. This  study was conducted for a period of  12 months in the department of  Anatomy,  Government  Medical  College, Omandurar  Government Estate, Chennai–2, between  October 2016 –  October 2017   by  dissection method in 10   adult  cadavers(10– right & 10– left sides) . Then   results were  noted,  tabulated and  interpreted