Liquid supply system

A liquid supply system comprising:

• a first vessel in which ultracold liquid is housed;
• a second vessel disposed within the liquid in the first vessel to take in the liquid from the first vessel and to deliver the liquid into a supply passage communicating with an outside of the liquid supply system;
• a first bellows disposed to enter the second vessel;
• and
• a shaft formed to be reciprocated by a driving source to cause the first bellows to expand and contract,
• wherein an outside of the first bellows in the second vessel serves as a first pump chamber provided with a first intake port for taking the liquid in the first vessel into the first pump chamber and a first delivery port for delivering the liquid from inside the first pump chamber into the supply passage, and
• an inside of the first bellows serves as a second pump chamber formed by a sealed space and provided with a second intake port for taking the liquid in the first vessel into the second pump chamber and a second delivery port for delivering the liquid from inside the second pump chamber into the supply passage.