Sialography is considered as a useful and reliable technique in evaluation of salivary glands especially intrinsic and acquired abnormalities involving the ductal system and is useful for detection of non-radiopaque sialoliths which are invisible on routine plain radiographs. Primarily sialography is used as a diagnostic tool, additionally it plays an important therapeutic role as salivary gland lavage in cases of recurrent salivary gland infections and in obstructive salivary gland disorders by helping in clearance of mucous plugs or small sialoliths within the ducts. The purpose of this Book is to review the Historical Background, definition, indications, contraindications, contrast media used, techniques of Sialography, techniques for introducing the contrast media, natures of Sialography, sialographic interpretation, complications of Sialography, CT Sialography, Submandibular Sialography in Combination with Pneumoradiography and Tomography and interventional Sialography.