<p>The present study explores the effectiveness of attention training technique on cognitive and metacognitive processes among individuals with alcohol use disorder. Randomly assigned in three groups, the sample consisted of 60 male patients aged 18–65 years who applied to a clinic specializing in addictions and were diagnosed with alcohol use disorder according to DSM-5 criteria. While the first group took treatment, the second and third groups were administered a standard treatment protocol supplemented with attention training technique and relaxation interventions, respectively. Then, we evaluated the participants’ pre- and post-intervention outcomes as well as their follow-up outcomes one and three months after the interventions. The two-way analysis of variance (ANOVA) for mixed-design with pre- and post-tests yielded statistically significant differences within and/or between groups in cognitive (anxiety sensitivity/cognitive symptoms, trait anxiety/cognitive) and metacognitive (worry, metacognition/positive beliefs about worry) measures as well as in attentional control, and we concluded that these findings were maintained in follow-up measurements. Additionally, the modified intention-to-treat analysis to eliminate any possible bias due to study quitters in the follow-up measurements indicated that the same effects were maintained only in attentional control, anxiety sensitivity/cognitive symptoms, and worry scores of the participants. Overall, we were able to reveal that the integration of the attention training technique - a transdiagnostic and metacognitive technique - into an alcohol use disorder treatment protocol may affect the prognosis of the disorder and bring desirable impacts on patients’ outcomes.</p>