The aim of this study was to investigate the effectiveness of mindfulness training on time perspective, time metaphorical perception, and Internet addiction. The study used a quasi-experimental pretest-posttest design with a control group. The statistical population included all students of Payam Noor University- Alborz Province (Karaj branch), in 2025. In this study, 50 students from Karaj branch, were selected through convenience sampling, and randomly assigned to two experimental groups (25 people) and control group (25 people). Research tools included Zimbardo and Boyd's Time Perspective Inventory, Raiisi and the Moghadasins' Time Metaphorical Perception Questionnaire, and Young's Internet Addiction Questionnaire. The mindfulness training protocol was implemented on the experimental group in eight 90-minute sessions, and the control group did not receive any intervention. The results of mixed analysis of variance showed that mindfulness training had effects on the means of time perspective, time metaphorical perception, and Internet addiction in the experimental group during the time (P<0.01). It seems that the use of mindfulness-based educational interventions can be an effective solution for managing and viewing time and solving Internet addiction problems in university students.