To solve problems that it is difficult to find a place to lay a round fan for a toilet and also difficult to continuously secure the sanitary management and use.

This round fan is formed of a single paperboard or a plastic board sufficiently larger than the width of toilet paper and its handle part has an approximately rectangular shape with a roughly same width to the width of the toilet paper. This round fan is characterized in that the handle part is formed into an insertion piece detachably inserted and held in a clearance between a lid of a toilet paper holder and a wall surface installation part and can be set to a toilet paper holder.