The sacroiliac joint is a synovial articulation between the sacral and iliacarticular surfaces. The sacroiliac joint (SIJ) has been implicated as the primary painsource in 10% to 25% of the patients with low back pain. The InternationalAssociation for the Study of Pain (IASP) has proposed criteria for making thediagnosis of symptomatic SIJ and are: (1) pain is present in the region of the SIJ,(2) stressing the SIJ by clinical tests that are selective for the joint reproduces thepatient’s pain and (3) selectively infiltrating the symptomatic joint with localanaesthetic completely relieves the patient of pain The main causes of sacroiliacjoint pain are seronegative spondyloarthropathies, infection, tumors, pregnancy andtrauma. Treatment of sacroiliac joint pain depends upon the cause. Any underlyingcondition would receive treatment specific for that disease. Treatment modalitiesinclude medications, physical therapy, bracing, manual therapy, injections,radiofrequency, denervation, and arthrodesis.