A content management system includes a conversion a section, a display data storing section, a field section, an operation section and a management section. The conversion section converts content data into display data which is to be written into an electronic paper. The display data storing section stores the display data. The field storing section stores field data which includes identification information of a first user belonging to a field and identification information of the display data. The operation section accepts a request from a second user. The management section that allows, when the identification information of the first user contained in the field data coincides with identification information of the second user contained in the request accepted by the operation section, the display data indicated by the identification information contained in the field data to be written into the electronic paper.