It is important that trainee teachers in the faculties of education should develop their critical thinking skills so that they can meet the expectations and needs of their profession. The goal of this study was to investigate the relationship between critical thinking skills and in-class questioning behaviors of English Language Teaching (ELT) students at the Faculty of Education at Mugla University.The data suggest that the questions asked by the students of the higher critical thinking score group are not questions that clarify unclear points, but questions asked out of curiosity, to remove the uncertainties, and to lead people to think profoundly.