Introduction It can be asserted that an effective organization requires personnel who are aware of their roles and responsibilities in accordance with organizational rules and order by means of structure, purpose and process of an organization. The written set of rules of an organization determines subordinatesuperior relations; behavioural types and responsibilities of managers, teachers, other personnel in the school and the students. They also show what kind of sanctions the personnel will encounter. If one of the most important and unique aspects of educational organizations from other organizations is the raw material, which is human being, intended to be processed, the other one is the dependence of effective and productive management to good human-relation to a great extent. This fact draws us to emphasize the importance of the relationship and communication of the personnel, who take role and duties in arranging organizational routines in the organization. It can easily be understood that school principals take on tasks and duties in the organized structure to investigate and examine the disagreements in educational organizations. It can be asserted that among their duties such as instructional leadership, budget, planning school programme, representing the school, arranging the environmental relations, their duties about investigating play a negative role and has important implications by means of effective and productive managerial performance. The purpose of this paper was to determine the problems school principals encountered when they fulfil their investigation duties. Method In this research phenomenological research method, which is one of the qualitative methods was used. In determining the work group, criterion sampling was used. The criteria used to determine were having spent at least four years in the head manager position either in primary or in secondary schools, having already fulfilled more than one investigation duties. In the education directory of Muratpaşa among 63 school principals, based on criteria, 41 principals were selected and interviewed preliminarily. Consequently, six primary school principals who accepted to participate voluntarily constituted the sample.In this study, in order to collect data, semi-structured question form was used. For internal validity, the sources of the data were analysed in details, emphatic attitude was run for the experiences of the participants interviewed. For external validity, descriptive approach was adopted. In order to provide internal reliability, the questions were directed in the same manner to the participants and the interviews were recorded. In order to provide external reliability, the raw data and all of the sources were prepared and kept to allow other specialists analyse and compare with the findings. Two researchers analysed the data separately. Cohen’s kappa test was referred and calculated. As a result, reliability was found to be [(K) = 0,80] at good level. In analysing the data both descriptive and content analysis methods were used. The data was analysed using QSR NVİVO, which is a program designed to analyse qualitative data. Result and Discussion School principals reported that they were not experts to fulfil such a duty which requires specialized information and talents. According to them, the time, amount and the content of the in-service training they had was not enough. They also stated that the in-service training programmes included to a great extent theoretical contents and it should be based more on practice. In this respect, they reported that in-service training should be carried out by specialists of the subject area. They stated that they used their cars for transportation and spent their budgets for the investigations. As a result, they thought that an amount of payment should be assigned for each investigation since it is an extra effort.School principals reported that 30 days given for an investigation was not enough, especially because of their other responsibilities in managing the school. According to them, they faced many difficulties because the attachments sent with incomplete and colourless task orders; the letters of application are without names, date and signatures on them and they are not prepared appropriately to the related legal arrangements; the issues are not stated properly because of