Background: As the importance of safety during sports activities continues to gain emphasis socially, the interest in creating a culture of safety and safety education to support this is also increasing. However, no study has examined the willingness of adolescents to complete safety education voluntarily. To identify methods of building a culture of sports safety among adolescents, this study investigated the structural relationship among three related variables: sports activity habits, intention to complete safety education, and sports safety awareness of Korean adolescents. Methods: Data on 3928 adolescents aged 13–18 years old from the 2019 Sports Safety Accident Survey conducted by the Korea Sports Safety Foundation were analyzed. This encompassed frequency analysis, scale reliability, validity verification, descriptive statistics analysis, path analysis, and mediating effect verification. Results: The results indicated that sports activity habits among these adolescents had a positive effect on their sports safety awareness and on their intention to complete safety education; further, their sports safety awareness had a positive effect on their intention to complete safety education. The results also showed that sports safety awareness had a partial mediating effect between sports activity habits and intention to complete safety education. The willingness of adolescents to voluntarily complete safety education is particularly important, as adolescence is a critical period when lifelong safety habits can be formed. Conclusions: Based on the results, discussions on creating safe sports activity habits for adolescents and continuous education on sports safety awareness are needed. Ultimately, we need to improve sports safety awareness by paying attention to the development and implementation of sports safety education programs for adolescents as a national policy and, through this, increase their willingness to complete safety education.