摘要:Background: Lifestyle affects people's health and life length, however, no sufficient studies have been done on the effect of lifestyle on middle-ageing, as the transitional period from adulthood to old-ageing, this study has been conducted to study the effect of educational intervention on health promoting lifestyle of middle-aged women in Lenjan city of Isfahan Province, Iran. Methods: This quasi-experimental study was conducted on 88 middle-aged women were selected through randomized sampling from two health centers in Lenjan, and then were categorized into experimental and control groups. To collect data, a researcher-made demographic and life style questionnaire was used. The educational intervention was performed in five sessions. Data were collected from both groups in two stages: Before the intervention and 3 months after the education. Data were analyzed with using SPSS-20 and P Results: The results showed that educational program had a positive significant effect on increasing the mean scores in the intervention group, considering the physical activity, mental health, and interpersonal relationship, P P = 0.113). Conclusion: According to the findings, it is evident that educational intervention is beneficial for various aspects of middle-aged women's lifestyle. Therefore, applying a healthy lifestyle seems essential for having a healthy aging period, and educational intervention can be effective.