A liquid mixing apparatus includes a flow channel configured to supply a liquid therethrough; a vortex-flow generating unit including a conductive member and an electrode, and configured to generate a vortex flow in the liquid in the flow channel by an electric field, the conductive member being provided in the flow channel, the electrode applying the electric field to the conductive member; a directional-flow generating unit connected to an end portion of the flow channel and configured to generate a flow of the liquid in a direction along the flow channel; and a switching unit configured to switch between the vortex flow and the directional flow.
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