Purpose: The goal of this study was to investigate the effect of core strength exercises on the balance control and walking ability of stroke patients. Methods: Twelve stroke patients participated in this study. These patients were divided into two groups (a core stability group and a control group). There were 6 subjects in each group. They participated in core strength exercises for 3 weeks. These exercises included The Timed Up and Go Test (TUG). Messen Trairuieren Dokumentieren (MTD) Systems for balance and walking were measured and compared before and after the treatment. Results: First, core strength exercises improved balance control of patients with stroke by increasing weight shifting to the affected side. Second, core strength exercises improved the walking ability of patients with stroke by reducing the TUG score. Third, there was a significant correlation between balance control and walking. Conclusion: Core strength exercises are effective for improving both balance control and walking.