Background: This study aimed to determine knowledge and attitudes of self-identified male nursing students who are in a risky age group regarding testicular cancer and testicular self-examination. Method: In this cross-sectional survey, the data was collected on 208 Turkish students between the ages of 18-22 years. The data was collected by using the Champion's Health Belief Model Scale for Testicular Cancer Screenings and the Personal Information Form. Results: The mean age of the participants in this survey conducted in the 2018-2019 academic Spring semester was 21.46 ± 2.031. The mean scores for the subscales were as follows: for perceived susceptibility 11.49 ± 4.70 (min = 5, max = 25), for seriousness 21.04 ± 6.11 (min = 7, max = 35), for self-examination benefits 10.88 ± 3.05 (min = 3, max = 15), for self-examination barriers 11.49 ± 3.75 (min = 5, max = 25) and for self-efficacy subscale 18.12 ± 5.52 (min = 6, max = 30). Also it was determined that 68.6% of the students do not know how to perform self-examination. Students' sensitivity to testicular cancer and related screenings increased with their level of knowledge. Conclusion: The results will explain how students' health beliefs were affected by their individual knowledge level. Nursing students should be exposed to information on testicular self-examination. Therefore, some suggestions are presented according to the health belief model to increase awareness of individuals, especially in the risky group, and improve people's health behaviors.