A liquid supplying system includes a cartridge having a first storage chamber, a tube to which the cartridge is connectable, a tank having a second storage chamber, and a detector. The liquid stored in the first storage chamber of the cartridge connected to the tube is introduced through an opening of the tube. The liquid introduced through the opening flows through a liquid passage of the tube. The tank includes an inlet port for introducing the liquid flowing through the liquid passage into the second storage chamber. The detector detects whether a level of liquid in the second storage chamber is at a predetermined position that is below the opening and above the inlet port. The second storage chamber has a horizontal cross-sectional area greater than a horizontal cross-sectional area of the liquid passage in a region above the predetermined position and below the opening in a vertical direction.