PROBLEM TO BE SOLVED: To provide a beverage producing device comprising a milk foamer having high maintainability.SOLUTION: A beverage producing device comprises: a large-diameter gear and a small-diameter gear (a first gear and a second gear)； a case housing the large-diameter gear and the small-diameter gear in an internal space； a motor side magnet； a gear pump motor (a motor) with a rotating shaft to which the motor side magnet is attached； and a pump side magnet 745 magnetically coupled to the motor side magnet, and incorporated in the large-diameter gear. The pump side magnet 745 is a closed magnetic circuit type magnet formed like a cylinder, comprising at least a pair of magnetic poles in one bottom surface of the cylinder, and forming a closed magnetic circuit in which magnetic lines of force pass through the inside from the bottom surface and head toward the bottom surface again.SELECTED DRAWING: Figure 13C【課題】メンテナンス性が高いミルクフォーマを有する飲料製造装置を提供する。【解決手段】大径ギヤおよび小径ギヤ（第１ギヤおよび第２ギヤ）と、大径ギヤおよび小径ギヤを内部空間に収容するケースと、モータ側磁石と、モータ側磁石が回転軸に取り付けられたギヤポンプ用モータ（モータ）と、モータ側磁石と磁気結合し、大径ギアに内蔵されるポンプ側磁石７４５と、を有し、ポンプ側磁石７４５は、円柱状に形成されており、円柱の一方の底面にのみ少なくとも一対の磁極を有し、磁力線が底面から内部を通って再び底面に向かう閉磁路を形成する閉磁路型の磁石である。【選択図】図１３Ｃ
