The current study aimed to explore the impact of a school-based mindfulness intervention on bullying behaviors among teenagers. A cluster randomized controlled trial was conducted, in which the experimental group (n = 92) received mindfulness intervention, and the control group (n = 97) did not. The measured outcomes included: bullying behavior, self-control, and trait mindfulness. The results were as follows: (1) the post-test scores of trait mindfulness and self-control in the experimental group significantly increased (p < 0.01) while the sc...