An agitator according to embodiments of the present disclosure includes: an agitation tank; a rotation axis that is installed to rotate within the agitation tank; a first wing portion that is connected to the rotation axis and includes a plurality of wings parallel to the rotation axis; and a second wing portion that is connected to the rotation axis and includes a band-shaped wing forming a screw thread along the rotation axis.

A mixer includes: a first rotary shaft provided in a housing across a first end and a second end of the housing in one direction; and a first rotary body mounted on the first rotary shaft inside the housing, the first rotary body that conveys a material supplied from a supply port toward a discharge port while mixing the material as the first rotary shaft rotates. The first rotary body includes: a first main body including a first recessed portion recessed in a helical shape; and a plurality of first scrapers provided in the first recessed portion and arranged along the first recessed portion. Each first scraper has a first inclined surface inclined so as to press the material toward the discharge port by rotation of the first rotary shaft.