This study was conducted to identify prevalence of sexual dysfunction and to determine factors influencing sexual dysfunction in middle aged women. The participants were 285 middle aged women. Data were collected through self-report questionnaires which were constructed to include general characteristics, FSFI (Female Sexual Function Index), sexual knowledge, sexual satisfaction. The mean score FSFI, sexual knowledge, sexual satisfaction were $14.82{pm}5.74$, $11.25{pm}2.67$, $45.84{pm}8.60$, respectively. The score for sexual dysfunction showed significant difference age(F=3.52, p=.031) and health status(F=3.66, p=.013). Sexual dysfunction had significant positive correlation to sexual satisfaction(r=.46, p<001). Age and sexual satisfaction were significant predictor and accounted for 22% of the variance in sexual dysfunction middle aged women. Future sexual dysfunction management program for middle aged women should be considered their emotional, psychological, socio-environmental factors.