The results of this study indicate that patients with schizophrenia are likely to be more obese. Some characteristics of patients with less severe psychopathology, such as late onset, being obese, were coincident with the result of previous studies. In addition, the result showing that the heavier the weight of patients, the lower severity of symptoms was repeatedly reported in previous studies. The type and dose of antipsychotics were not associated with obesity. These results prompt further investigation of the relationship among schizophrenia, antipsychotics, and weight gain.