This is a case of bilateral cavernous sinus thrombosis in a five-and-a-half-year-old boy who presented with bilateral proptosis with difficulty in swallowing and excessive salivation. Clinical features along with contrast-enhanced computed tomography and hemogram diagnosed the case as bilateral cavernous sinus thrombosis and retropharyngeal abscess with third cranial nerve palsy. The patient was treated with standard regimen successfully. Cavernous sinus thrombosis is a very rare complication of retropharyngeal abscess.