ABSTRACT Objective: To verify the effect of an educational intervention about airway obstructions and an airway clearing technique in teachers from Municipal Child Education Centers in a municipality in western Paraná. Method: A quasi-experimental pre- and post-test study. Data was collectedusing a questionnaire with thirty questions to assess knowledge about the subject. For the analyses, the chi-square and McNemar tests were used, withanα = 5% of significance. Results: After the training sessions, there was a 16.22% increase in the number of correct answers to the questions dealing with the recognition of the obstruction (<0.0001) and the airway clearance technique (<0.0001). Conclusion: The intervention improved the knowledge of early childhood teachers in the municipality regarding the identification of airway obstruction and techniquesairway clearing in school-age children.