Provided is a liquid dispenser that can easily be held by hand to discharge a liquid containing nano-bubbles, has a simple structure, and does not require power. The liquid dispenser 12 includes a nano-bubble generating structure 30 for generating nano-bubbles in the liquid by cavitation, a manual pump 14 for flowing the liquid through the nano-bubble generating structure, a handy bottle 13 for storing the liquid, and a discharge member 15 for discharging the liquid in the bottle to the outside of the bottle. The nano-bubble generating structure preferably includes a venturi passage including an inflow part, a restriction part, and an outflow part. The restriction part is formed of a hole having a polygonal cross section, and the inflow part is formed of a pyramid inner surface having a polygonal cross section which is reduced in diameter in a flow direction and connected to the restriction part. Each polygon...

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