The present writing is inspired by the master's thesis research published in 2018 by the same author, whose title is Terapia de grupo orientada cognitiva- conductualmente, sobre la ansiedad-estado de docentes de la región de Panamá Oeste, 2018; and is in the digital Institutional Repository of the University of Panama. Group psychotherapy has shown its potency both at a preventive level and in approaching serious psychopathologies; therefore, the objective of this research was to evaluate the effectiveness of a group psychotherapeutic intervention on anxiety in teachers at official schools in the West Panama region. It followed an explanatory methodology with a pretest, posttest, and a single group. The non-probabilistic sampling was completed by convenience and voluntarily, the sample consisted of twelve (12) teachers from 30 to 56 years old, with different specialties. Anxiety-state was measured through State-Trait Anxiety Inventory by Spielberger, and each participant was clinically interviewed. Eight (8) group psychotherapy sessions were designed and implemented, in which a conceptualization and application of cognitive-behavioral techniques were accomplished, with a relational approach based on attachment theories and playful techniques. The comparison of means of the T-scores before and after the treatment reflected the change of clinical significance from anxiety considered high or very high to a very low, low, or average level of anxiety. The Student’s t-test was used for paired samples and a significant difference was obtained at the 0,05 level > p0,00 which proved that the intervention performed decreased the state-anxiety level of the teachers, favoring the rewriting of narratives and making thoughts more flexible, developing functional and adaptive coping strategies and optimize relational patterns.