Much has been written and researched about mobile learning. The positive impact it has on education has been highlighted in these studies. However, the role of the teacher is also of fundamental importance. Teachers are not sidelined. On the contrary, they take on a different role: reinforcer and guide. Therefore, it is necessary to consider teachers' opinions on mobile learning. It was considered necessary to investigate the degree of readiness of secondary school teachers to adopt Mobile Learning, focusing on the Greek region. Specifically, the study examines how teachers' readiness is affected by their gender, years of teaching experience, whether or not they have attended relevant training, and the type of school they work in. A total of 175 teachers from schools in Heraklion, Rethymno and Rhodes were surveyed, focusing on secondary education. According to the survey, teachers recognize the potential benefits of using mobile devices in education.