The Shishibone Municipal Library (鹿骨市立図書館, Shishibone-shiritsu Toshokan) first appears in Watanagashi-hen when Shion asks Keiichi to meet her there. It is a normal local library with many bookcases and a reading space. It has a treasure trove of information regarding the old traditions and customs of Hinamizawa. Most frequently, the library is the place where Shion and Mion meet and talk secretly, and it is also the place where Takano gives her notebooks to Rena.

The Child Welfare Office having jurisdiction over the region of Hinamizawa, etc., is located in the premises of this building and serves as a key plot point in Minagoroshi-hen.