Dispenser

A dispenser comprising:

• a container that stores a liquid;
• a pump unit that is attached to a mouth of the container;
• and
• a cover member that is arranged in the container and has a space in which the pump unit can be arranged, wherein
• the pump unit comprises:
• a liquid delivery mechanism that is configured to take a liquid suction action to suction the liquid in the container, and take a liquid delivery action to deliver the liquid suctioned from the inside of the container;
• a case part that has a space in which the liquid delivery mechanism is arranged and has an inner communication hole for providing air communication between the inside and the outside of the case part;
• and
• an inner opening-closing part that is configured to open the inner communication hole by the liquid delivery action of the liquid delivery mechanism, and close the inner communication hole by the liquid suction action of the liquid delivery mechanism, and
• the cover member comprises:
• a cover body that is configured to form a storage space continuing from an inside of the case part through the inner communication hole between the case part and the cover body, while covering the case part in the container, and has an outer communication hole formed to communicate with the storage space and the inside of the container;
• and
• an outer opening-closing part that is configured to open the outer communication hole when an inner pressure of the container is lower than the inner pressure of the storage space, and close the outer communication hole when the inner pressure of the container is equal to or higher than the inner pressure of the storage space.