This study evaluated the Comparison of the Effectiveness of Pelvic Floor Muscle exercise and Biofeedback treatment for Genuine Stress Incontinence I assigned 60 participants to 2 groups : 30 to the pelvic floor muscle exercise group and 30 to the biofeedback group. Treatment protocol lasted for 6 weeks. Peak pressure, and duration time of pelvic muscle contraction were evaluated by a perineometer. Lower urinary symptoms, sexual matter and life style scores were achieved by using Jackson's scale. The treatment efficacy of the pelvic floor muscle exercise is compared with the biofeedback group and the main results of the comparison are as follows: 1. Pelvic muscle contraction 1) The peak pressure in the biofeedback group was significantly increased(P=0.000). 2. The frequency and quantity of incontinence 1) The frequency of incontinence in the biofeedback group was significantly decreased(P=0.000). 2) The quantity of incontinence in the biofeedback group was significantly decreased(P=0.000). 3. The lower urinary symptoms Daily frequency(P=0.000), nocturia(P=0.000), urgency(P=0.000), bladder pain(P=0.000), unexplained incontinence(P=0.048), wearing protection(P=0.022), changing outer clothing(P=0.005), hesitancy(P=0.008), intermittent stream(P=0.000), abnormal strength of stream(P=0.004), retention(P=0.000), incomplete emptying(P=0.000), and inability to stop mid steam(P=0.006) of the lower urinary symptoms in the biofeedback group were significantly decreased. 4. The sexual matters The dry vagina(P=0.004) and pain during sexual intercourse(P=0.002) in the biofeedback group was significantly decreased. 5. The life style. The fluid intake restriction(P=0.007), affected daily task(P=0.003), avoidance of places & situation(P=0.003), interference in Physical activity(P=0.002), interference in relationship with other people(P=0.01), and feeling about the rest of life with urinary symptom(P=0.000) in the biofeedback group were significantly decreased. In conclusion, the biofeedback treatment was more effective than the pelvic floor muscle exercise in genuine stress incontinence.