Shadow IT represents a software, hardware, or any other solution used by employees within organizations that has not received any prior formal approval from the IT department to be used. Currently, the issue of Shadow IT is increasingly under discussion and is beginning to be explored in the private sector. However, this issue is not addressed comprehensively in the public sector. The main aim of this paper is therefore to propose a Shadow IT management concept for the public sector. The proposal of Shadow IT management concept identified problematic areas related to Shadow IT discovered during a case study in connection with the main aim of the paper. There are 7 areas designated as A1 to A7. The recommended approaches and solutions are set for these problem areas. Shadow IT Management Concept was created based on the case study (including interviews with main stakeholders).