Hematological and coagulative-analytical findings are represented in 10 patients aged between 3 months and 12.9 years affected with a typical Kawasawski syndrome, a disease which, etiologically, has not been elucidated and which will predominantly occur at the early childhood. During the hemostaseological examinations the significantly increased fibrinogen level at the initial stage was particularly striking in 6 patients. Partially a considerable number of leukocytoses with a shift to the left appeared almost constantly during the acute stage of the disease. At the subacute stage, however, mostly moderate thrombocytoses could be detected. The differential-diagnostic as well as the therapeutic significance of such alterations and the present possibilities of treating them with acetylsalicylic acid or prednisolone respectively are evaluated.