In studying the relation of blood stagnation syndrome and rheumatoid arthritis, the incidence and the severity were evaluated on 78 subjects of rhumatoidal poly arthritis (4 males, 74 females) aged 38-83 in Toyama Hospital, in April 2001. The incidence of blood stagnation in 53.8% following Terasawa is related significantly with the progress of rhumatoid poly arthritis, using the indication of Lansbury activity (p=0.083). This indicator increases dramatically in 5 patients of blood stagnation after 6 months (p=0.043). The results showed the relation between the level of stagnation and the activity of arthritis