Background and Purpose : In the acute stage of stroke, many medical and neurological problems complicate and affect the clinical course of patients. according to previous reports. Although some of them may be predicted, few data exist about them. So we were to investigate the characteristics of complications in hospitalized patients due to stroke. Methods : We retrospectively examined the clinical notes of patients admitted in Won Kwang oriental medical hospital after stroke. Two observers inspected the clinical notes using predefined diagnostic criteria and recorded the type, timing, and frequency of complications that occurred during hospitalization. Results: Total 78 subjects were included in this study. Medical complications(88%) were more frequently complicated than neurological ones(65%). The most common medical complication was constipation(29%) followed by fever(28.2%) and overflow incontinence associated with dysuria(28%). The most common neurological complication was dysphagia(23.7%) and the second was agitation or Insomnia(36%) and the third was headache(21%). Conclusion : Complications after acute stroke were commonly observed. And There were more frequent medical complications than neurological ones. So we should have much knowledge about medical complications and treat them actively. The differences between our study and previous studies are attributable to the different methods including patient selection and diagnostic criteria.