en Anxiety and Stress پژوهشي Research Article &nbsp;<strong>Background and Objective: </strong>Firefighters are at risk of mental health deterioration due to their stressful jobs, and psychological skills training plays a positive role in this regard. This study aimed to compare the effectiveness of resiliency training and emotion-regulation training on the psychological well-being and self-efficacy of firefighters.<br> <strong>Materials and Methods:</strong> This was an experimental study with a multi-group pretest-posttest control group design. In autumn 2018, forty-five Ardabil firefighters selected by simple random sampling were randomly assigned into three groups of resiliency-training (n=15), emotion-regulation-training (n=15), and control (n=15). All three groups completed the demographic questionnaire, Ryff&rsquo;s Psychological Well-Being Scale, and General Self-Efficacy Scale (​Scherer et al., 1982) in the pre-test and post-test stages. The collected data were analysed using SPSS software (version16) through the analysis of covariance and Bonferroni post hoc test.<br> <strong>Results:</strong> Resiliency training and emotion-regulation had a significant effect on one&rsquo;s psychological well-being and self-efficacy. The results of the post hoc test also indicated that the effectiveness of resiliency training and emotion-regulation on one&rsquo;s self-efficacy was significantly different and resiliency training was more effective than emotion-regulation training.<br> <strong>Conclusions: </strong>Resiliency training and emotion-regulation training were effective on the psychological well-being and self-efficacy of firefighters. Emotion-regulation training, Firefighters, Resiliency-training 199 204 http://ajnpp.umsha.ac.ir/browse.php?a_code=A-10-323-1&slc_lang=en&sid=1 Niloofar Sharifi Niloofarsharifi266@gmail.com 10031947532846005090 10031947532846005090 Yes Department of Psychology, School of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran Sajjad Basharpoor basharpoor_sajjad@yahoo.com 10031947532846005091 10031947532846005091 No Department of Psychology, School of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran Mohammad Narimani m_narimaniuma.ac.ir 10031947532846005092 10031947532846005092 No Department of Psychology, School of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran