The present project has for objective to describe the implementation of a blog as communication tool between Biblioteca Lydio Bandeira of Mello from University of Right of the Federal University of Minas Gerais and their users. It points out the importance and functions of the blog to the library as dynamic resource of spread of information and interaction space with the users. Therefore it describes the report, the definitions, the typology and the main characteristics of the blogs. It characterizes the librarian's paper in the academical libraries and it relates juridical information the library for which the blog was created. As methodological procedures for the construction of the blog, it had been used software free with contents and technological resources of easy handling. However the blog of Mello's Biblioteca Lydio Bandeira has as resulted acceptance of a new service of information and use for the users of the library

Keywords: Blogs. Academical libraries. communication.