Objective: To investigate the effects of sexual education provided via WhatsApp on the level of sexual knowledge and sexual myths in midwifery students in Turkey. Methods: Students were randomly divided into WhatsApp education, conventional education, and control groups. Data were collected using a Questionnaire Form, the Sexual Health Knowledge Test, and the Sexual Myth Scale. Results: Post-education and one-month-follow-up the Sexual Health Knowledge Test medians in the control group (24.0 and 27.0 respectively) were significantly lower than those of the WhatsApp (31.0 and 32.5 respectively) and conventional education groups (30.5 and 32.0 respectively) and Sexual Myth Scale medians in the control group (70.0 and 67.0 respectively) were significantly higher than those of the WhatsApp (55.5 and 60.0) and conventional education groups (53.0 and 55.0, respectively) (p <.001). There was no difference between WhatsApp and conventional education groups in terms of the Sexual Health Knowledge Test and Sexual Myth Scale scores (p > 0.05). Conclusion: Sexual education provided by conventional methods and via WhatsApp increased sexual health knowledge and decreased sexual myths.