Rheumatoid Arthritis (RA) is a chronic systemic inflammatory disorder of unknown aetiology that may affect many tissues and organs In the previous years, various authors have studied the association between disease activity of RA and these haematological parameters separately. The current study intended to find out the association of DAS 28-score of RA with platelet count, MPV and Hb level so that an assessment of disease activity of RA can be done by these haematological parameters in addition to conventional serological markers so that a better management of the patients of RA can be done.