To provide a pump device capable of suppressing the displacement along a rotation shaft of an impeller.SOLUTION: A pump device 10 includes a pump body 22 that rotatably houses an impeller 14 and a driving device 24 for rotating the impeller 14. The impeller 14 includes two-stage driven magnets 56 arranged in parallel to the rotation shaft of the impeller 14, and away from the rotation shaft by a set interval D. The driving device 24 is arranged in parallel to the rotation shaft and away from the rotation shaft by the set interval D, and includes two-stage driving magnets 76 opposed to the two-stage driven magnets 56 respectively so as to form magnetic coupling.SELECTED DRAWING: Figure 1【課題】インペラの回転軸に沿った変位を抑制するポンプ装置を提供する。【解決手段】ポンプ装置１０は、インペラ１４を回転自在に収容したポンプ本体２２と、インペラ１４を回転させる駆動装置２４と、を備える。インペラ１４は、該インペラ１４の回転軸と平行で且つ設定間隔Ｄだけ離れて配置された２段の従動磁石５６を有する。駆動装置２４は、回転軸と平行で且つ設定間隔Ｄだけ離れて配置され、２段の従動磁石５６の各々と磁気カップリングを形成可能に対向する２段の駆動磁石７６を有する。【選択図】図１
