Background: Pregnancy induced hypertension is an important cause of foetal ,maternal morbidity and mortality, particularly in developing countries. All of these deaths occurred could have been prevented through improving women 'self-care . The theory of planned behavior is one of the most frequently used theoretical frameworks for explaining behavioral intentions. Educational intervention based on theory of planned behavior will be more effective in changing the women’ intention and behavior. This study aimed to evaluate the effect of an intervention based on theory of planned behavior on self-care behaviors among women with pregnancy induced hypertension. Methods: A quasi-experimental design was utilized. Setting: The study was conducted at obstetrics and gynecology outpatient clinic affiliated to Benha university hospital. A purposive sample of 75 pregnant women were included in the current study. Three tools were used for data collection; first tool: interviewing questionnaire to collect data about the subjects' socio-demographic data, medical and obstetric history and knowledge regarding pregnancy induced hypertension.. Second tool; theory of planned behavior questionnaire, it composed of the four main constructs include attitude, subjective norms, perceived behavioral control and intention. Third tool : self-care behavior questionnaire Results: There were highly statistically significant differences (P