Hemiplegic patients with an ankle foot orthosis (AFO) has a tendency to show external rotation of affected side foot. External rotation inhibiting shoes (ERIS) were designed to inhibit excessive rotation of hemiplegic foot. ERIS were applied to two hemiplegic patients who were able to walk independently with a plastic AFO. Both of them showed an excessive external rotation of hemiplegic foot after AFO apply. Each patient tried to walk with a pair of common shoes first and ERIS later. The external rotation angle, step length, stride length, cadence, speed were measured by footprint method. The external rotation angle of hemiplegic foot was significantly decreased with ERIS than with common shoes. However they did not show consistent improvement in the step length, stride length, cadence and speed. We reported that hemiplegic patients who walked with ERIS showed remarkable reduction in excessive external rotation of hemiplegic foot. (J Korean Acad Rehab Med 2006; 30: 94-97)