The study aimed to identify the role of the teacher in spreading the culture of peace among secondary school students in the city of Riyadh, and to clarify the statistically significant differences among the sample members in relation to the role of the teacher in spreading the culture of peace among secondary school students in Riyadh from the point of view of students and teachers. The study population included all day public high school students and teachers in the city of Riyadh, which numbered (51044) students and (3564) teachers.