PURPOSE: In Korea, the prevalence of metabolic syndrome has increased. The relationship between metabolic syndrome, adiponectin, and dietary components is widely known. However, the relation between cytokine and dietary components is not yet well studied in Korea. METHODS: Five hundred and ninety-six Korean adults between 30 and 59 years of age were recruited by advertisement to the Bundang Jesaeng General Hospital (BJGH), and those not taking regular medications and without diagnoses of fulminant disease were included. Data was collected on anthropometric measurements, diagnostic parameters for metabolic syndrome (MetS), and 3-day dietary intakes from individuals in the study. RESULTS: Serum adiponectin level was positively correlated with serum HDL-cholesterol level and was negatively correlated with BMI, waist circumference, and systolic and diastolic blood pressure. Intake of dietary fiber was high in the high-adiponectin group. CONCLUSION: High-fiber diet and adiponectin can be helpful for improving metabolic syndrome.