A refrigerator is provided. The refrigerator (1) comprises: a body (10) including a refrigerating compartment, the refrigerating compartment comprising a refrigerating compartment chamber (12) and a refrigerating compartment door (30); a water supply container (220) having an upwardly directed opening member at an upper side thereof, the water supply container being selectively one of a main water supply container (220) having a first connection structure and a sub water supply container having a second connection structure different from the first connection structure; a container connecting part (202) disposed in the refrigerating compartment (12), the container connecting part including a container inserting hole (235) in which the opening member of the water supply container is inserted; a first coupling structure including a holder disposed in the container connecting part to selectively constrain the opening member of the main water supply container within the container inserting hole; a water supply passage fluidly connected to the water supply container; and a pump (250) fluidly connected with the water supply passage to pump water from within the water supply container.