Bolu, Dedeler Cuma Mosque is one of the rural religious architectural buildings reached to present day is located in Dedeler Village in Seben district. In order to determine the conservation problems of the mosque the studies have been conducted to document the current condition of the building, to assess the mosques which are similar to this mosque in terms of building type system plan layout and elements, to determine the demolished, changed and destroyed architectural elements of the building. In this article, it is aimed to narrate the historical and architectural characteristics of Dedeler Mosque as one of the rural architectural examples, by comparing it with similar mosques and to determine the conservation problems and suggestions in order to ensure its sustainability.