ENThe work aims at exposing the importance of constant learning of teachers under conditions of changing education, teachers’ needs and how the informal lifelong in-service educational institution, called Educational Centre, meets them. The characteristics of Educational Centre and its readiness to fulfil teachers’ lifelong teaching are analyzed. The teachers’ constant (lifelong) learning is investigated in details. The qualitative analysis of activity of Molėtai Educational Centre and its readiness to meet the needs of teachers’ constant learning are presented. At the end of the work the conclusions about teachers’ lifelong learning and readiness of the Educational Centre to do it are presented.