Aim: This study was carried out to evaluate health beliefs of women about early diagnosis of breast and cervical cancer. Material and Methods: The sample of this descriptive study consisted of 500 women who applied to four Family Health Centers in Zonguldak city center. A questionnaire form, Champion Health Belief Model Scale and Attitude Scale for Early Diagnosis of Cervical Cancer were used for data collection. Number and percentage, Mann Whitney-U test, Kruskal-Wallis test and Mann-Whitney U test with Bonferroni correction were used for data analysis. Results: It was determined that women's perceptions of seriousness, health motivation, benefit, and self-efficacy towards the early diagnosis of breast cancer were at a moderate level and their perceptions of susceptibility and barrier were at a low level. Moreover, seriousness, barrier, and overall perceptions of women for early diagnosis of cervical cancer were found to be at a moderate level and their susceptibility and benefit perceptions were detected to be at a low level. Conclusion: It is important to evaluate the health beliefs of women and the factors affecting their health beliefs in gaining early diagnosis behaviors for breast and cervical cancer.