Background: Kawasaki disease (KD) is a vasculitis affecting multi-organ systems including liver and kidneys. KD is diagnosed by some clinical criteria including sterile pyuria, microscopic hematuria, proteinuria due to renal involvement, liver abnormalities manifesting as abnormal liver function tests, gallbladder hydrops, and hypoalbuminemia. Objectives: The aim of the study was to determine the frequency of liver and renal abnormalities in patients with KD, hospitalized in Ali-Ebne-Abitaleb Hospital of Zahedan during 2006 - 2013. Materials and Methods: Paraclinical findings including serum and urine tests as well as gallbladder ultrasonography of 47 patients with KD hospitalized in Ali-Ebne-Abitaleb Hospital of Zahedan during 2006 - 2013 were reviewed retrospectively. Results: Liver abnormalities were found in 22 (46.8%) cases and impaired liver function tests were more common than other liver abnormalities in this cross-sectional study. The incidence of abnormal liver function tests in this study was about 42%. Gallbladder hydrops were found in 6 (12.7%) patients and 18 (38.3%) had renal involvement. Sterile pyuria was the most common urine abnormality with incidence of 36.2%. Microscopic hematuria and proteinuria were rarely found; in addition, serum urea nitrogen and creatinine had normal levels in all patients. Conclusions: The possibility of KD should be considered in any infants or children with abnormal results in liver or renal function tests. Paraclinical findings of liver and renal involvements of all patients were partly similar to the previous studies.