The purpose of this study was to investigate the effectiveness of teaching courage behavior skills on critical thinking and happiness among high school students in Bushehr. The research method is a quasi-experimental design with pre-test and post-test design. The statistical population of this study was 8238 secondary school students in Bushehr. 40 students were selected through multistage cluster sampling. Data were collected by Fachion Critical Thinking Questionnaire (1990), Arheyl Happiness (2002), and Zarei Daraborat (2006). Data analysis was performed using SPSS software and statistical methods of variance analysis (Ancova) and multivariate analysis (Manncova). The findings showed that there is a significant difference between the experimental and control groups in terms of at least one of the variables of the skill of daring behavior, critical thinking and happiness. In other words, it can be said that training the skill of arrogant behavior on critical thinking and knowledge happiness The students have a meaningful effect. There was no significant difference between the subjects in terms of critical thinking and happiness in the experimental and control group. The overall result of the research showed that promoting the skill of treason behavior can greatly help to increase the level of critical thinking and happiness of students.