This research was motivated by the low level of morality among vocational high school students, as indicated by behaviors such as truancy, violating school regulations, and smoking while wearing school uniforms. The study aimed to determine the effect of group guidance services based on the Mind Switch Card (Truth or Dare Morality) game on the morality of vocational high school students. This study employed a quantitative approach with a pre-experimental design using a one group pretest-posttest design. The research sample consisted of 6 students selected based on the pre-test results. Data collection techniques included morality questionnaires, interviews, and observations. Data analysis was conducted using the Wilcoxon Signed Rank Test.. The results showed that students’ morality levels before treatment were categorized as low, moderate, and high. After the implementation of group guidance services based on the Mind Switch Card game, students’ morality levels increased, as indicated by the absence of students in the low category and the increase in the number of students in the moderate and high categories. The Wilcoxon test results showed a Z value of -2.207 with a significance value of 0.027 < 0.05, meaning that the alternative hypothesis was accepted. These findings indicate that group guidance services based on the Mind Switch Card (Truth or Dare Morality) game had a significant effect on improving the morality of vocational high school students. Therefore, this service can serve as an innovative and interactive counseling guidance alternative to help develop students’ morality.
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