The purpose of this study was to evaluate the cognitive perceptual performance in relation to activities of daily living in stroke patients who were treated at department of rehabilitation medicine of the Samsung Medical Center from December 5. 1996 to April 10, 1997. The cognitive perceptual performance was measured by the Lowenstein Occupational Therapy Cognitive Assessment (LOTCA) and by the Modified Barthel Index (MBI) to evaluate activities of daily living(ADL). Sixty-seven stroke patients were the subjects in this study. Collected data analysis were completed by using t-test. ANOVA, correlation analysis, and multiple regression analysis. The following were as follow: 1. Among the subtest of the LOTCA, orientation to time, plain block design, reproduction of puzzle showed significant difference depending on patient's affected side. Orientation to time score was higher with left hemiplegic patients. Plain block design and reproduction puzzle score were higher with right hemiplegic patients. 2. Among the subtests of the MBI, dressing, ambulation, and self-care were significantly correlated with the subtests of the LOTCA in order of thinking operation, visuomotor organization, perception and orientation. 3. The result of the cognitive perceptual function affecting the MBI performance using multiple regression analysis, thinking operation was the most influential factor. The cognitive perceptual perfomance have significant correlation with activities of daily living skills. Also, it is an important factor to functional recovery after stroke. Therefore, accurate evaluation of cognitive perceptual performance after stroke with treatment of each patient's appropriate level should be done simultaneously with rehabilitation treatment to improve patient's activities of daily living skills.