A liquid transfusing tube and a liquid transfusing tube set in which a liquid transfusing line can be extended readily and quickly. The liquid transfusing tube comprises a flexible tube constituting the liquid transfusing channel, a connector provided at one end part of the tube, and a pointed bottle needle provided at the other end part of the tube and being connected to the side of a liquid transfusing bag containing a liquid being transfused. A roller klemme and a drip tube are provided in the middle of the tube. The connector has two female connectors, a male connector, and an operating lever and the communication pattern between the inner cavity of the female connector and that of the female connector or that of the male connector can be selected by means of the operating lever.