The aim of this study is to investigate the opinions of the teachers working in primary education institutions towards in-service trainings (seminar period). Seventy-five teachers working in elementary and secondary schools in Tepebaşı district of Eskişehir province participated in this research. This is a qualitative research, and the data were collected through an open-ended questionnaire and analyzed with the descriptive analysis technique. The themes of the findings were opinions, activities, expectations, training topics and requests. As a result of the study, it was revealed that in-service trainings were not beneficial but they were beneficial in terms of announcing the changes in the education system. The teachers also stated that the preparations for the next academic year were shared during the in-service trainings, and that activities in terms of research and analysis were held in these trainings. They emphasized that the seminar durations must be shortened, and that the in-service trainings must be carried out practically and separately for each branch with the help of specialists. In addition, the teachers thought that the professional trainings should include the subjects related to students and teachers, the rights of the teachers and the developments related to the teaching. In addition, they wanted these in-service teacher trainings to be easily accessible, and to be done in the province where the teachers live or at social facilities.