Sialolithiasis is a major cause of salivary gland dysfunction. Chronic sialadenitis promotes stone formation. Conversely the presence of calculi causes chronic sialadenitis. It is clear that the genesis of calculi lies in relative stagnation of a calcium rich saliva. The submandibular gland is a more common site than the parotid, sublingual and other minor salivary glands for calculi formation. This case is presented here because of its unusual size of the wharton's duct stone for its clinical interest.