There is provided a refining device in which a first rotor portion has a plurality of first blades radially installed around a rotation shaft, a second rotor portion has a plurality of second blades radially installed around the rotation shaft, in a state where a rotor is rotating, a raw material charged from a charging port is refined when sequentially passing between a liner and an end portion on an outer peripheral side of the first blade and between the liner and an end portion on an outer peripheral side of the second blade, and is discharged from the discharge port, and D1>D2, where a separation distance between the liner and the end portion on the outer peripheral side of the first blade is D1, and a separation distance between the liner and the end portion on the outer peripheral side of the second blade is D2.