Stirring apparatus and stirring method

[Problem] The purpose of the present invention is to provide a stirring apparatus that requires less power and that can extremely uniformly stir the interior of a stirring tank. [Solution] The present invention includes a stirring tank 2, a rotor blade 5 provided in the stirring tank 2, and stator blades 8 that are provided at the bottom of the stirring tank 2 and that extend radially, and is characterized in that the rotor blade 5 includes one or more flat tapered blades 6.