Purpose: This study was done to identify prevalence of, and factors influencing metabolic syndrome among long-term care facility patients with schizophrenia. Methods: A cross-sectional survey was conducted using a 20-item questionnaire. Clinical data for blood triglyceride, HDL-cholesterol, and fasting blood sugar were collected from medical records. Body weight, body fat, body mass index, blood pressure, height, and abdominal circumference were measured. Data for 198 participants were analyzed using t-test, x(2) test and logistic regression. Results: Prevalence of metabolic syndrome was 56.1%. The number of persons who overate was significantly higher in the metabolic syndrome group than in the normal group (p<.001). Factors influencing metabolic syndrome were hyperphagia (p<.001), abdominal circumference (p<.001), systolic blood pressure (p=.040), blood triglyceride (p<.001), fasting blood sugar (p=.015), and HDL-cholesterol (p<.001). Conclusion: The results indicate that nurses working with patients who have chronic schizophrenic should make an effort to help patients achieve control of overeating behavior and reduce abdominal circumference to prevent metabolic syndrome.