Background: Frequent heating oil practice is widespread, the useful role of vegetable oils become worsen when frequently treated with higher temperature and air makes it harmful for human consumption. Aim: to assess knowledge, attitudes and reported practices of women about hazards of frequently heated cooking oil in the rural of Sohag district. Design: Descriptive cross-sectional study was included 220 women attending two health units that randomly selected from health units of Sohag district. Methods: A structured questionnaire was administered through face-to-face interviews by the researchers. All respondents were interviewed throughout the period from the first of March to the end of August 2024. It comprised five main parts; Part I: Demographic data. Part II: Self Reported health problems of study participants. Part III: Women's knowledge concerning hazards of frequently heated cooking oil. Part IV: Women's attitudes regarding usage of hazards of frequently heated cooking oil. Part V: Women's reported practices regarding hazards of frequently heated cooking oil. Results: The study revealed that 55.5 % of women aged ≥ 30 years, 83.6 % of them were housewives. Alongside 93.2% of them had poor knowledge regarding hazards of frequently heating cooking oil. Conclusion: Women had poor knowledge, negative attitudes and poor practices about hazards of frequently heated cooking oil, so they and their family at higher risk for different health and environment related problems. Recommendations: The study recommended that further researches on a larger study sample are needed to allow for generalization of the study results, improving women's knowledge, attitudes and practices by conducting educational programs.