Background: Rheumatoid arthritis (RA) is a chronic inflammatory disease characterized by joint swelling, joint tenderness, and destruction of synovial joints, leading to severe disability and premature mortality. Early rheumatoid arthritis is defines as “RA with duration of disease/symptoms of disease < 6 month.” Aim:To study serum vitamin D level in newly onset rheumatoid arthritis patients. Methodology: It is a Case-control study, all patients fulfilling revised American College ofRheumatology criteria/EULAR criteria(2010) for Rheumatoid Arthritis being attended to in therheumatology clinic, Tools like Oral questionnaire, History & Clinicalexamination,laboratory equipments will be used.Sample size is 45 cases and 45 controls, complying with inclusion and exclusion criteria.