Post-stroke depression (PSD) constitutes an important complication of stroke, leading to great disability. After stroke, the prevalence rate of depression is about 30%. Depression also affects rehabilitation motivation, delays function recovery, and increases family and social burden. The objective of this study was to explore the effect of social support on depression in chronic stroke patients and the relationship between demographic and disease characteristics. Total samples were randomly divided into an intervention group (n = 31) and a control group (n = 31). Sixteen social support interventions were performed over 8 weeks. Social support programs were implemented 2 times a week. Depressive symptoms were assessed at the second week, 4th week, 8th week, and 4 weeks after the end of the study using the 10-item Center for the Epidemiological Studies of Depression Short Form (CES-D10). There was a significant correlation between depression and the economic status of the patients with chronic stroke, satisfaction in leisure, the presence or absence of caregivers, the duration of stroke, and with or without pain. A significant difference was found between two groups after social support for 8 weeks. Our findings suggest that remission of PSD needs at least 8 weeks of social support.