Purpose The purpose of this study were how 10 effect baJance capacity to stroke patients who were taken knee extensor fatigue and were understood. Therapists offered the way of effective therapy to stroke patients in clinical trials. Methods The subject of this study were 16 chronic sσoke pa디ents (9 males, 8 females), 16 able-bodied control normal people(5 males, 11 females) and their average duration of symptoms were 4.9 years at S hospital in Sungnam city. Patients average age were 55.67, health control age were 59.13. Both sσoke patient control group and able-bodied age-matched control group were measured using maximal voluntary isometric contraction(MVIC) for leading knee extensor fatigue. Isometric contraction was run lOseconds continuously and each control was taken rest 5 seconds one time for inducing muscle fatigue. The end point was measured decreasing 3 times continuously which the value of MVIC was less 50%, and then the number of knee extensor 10 induce muscle fatigue, posi디 on sense, and balance and gait capability were measured after taking knee extensor fatigue. Results There was a significantly differences that Stroke patients group was shown that the paretic side knee extensor fatigue was represented faster than health control group (p<0.05). The balance capability were represented drastically decreased knee extensor fatigue in Stroke patients group’s non paretic side. Conclusion Therefore, localized muscle fatigue by gaiting abnonnal gait pattern to chronic stroke patient was affected the disability of balance capacity. And abnonnal gait pattem was brought secondly increasing number of falling down. These factors were considered to stroke rehabilitation.