<p>A tube for passing a liquid therein and a liquid feeder. The tube comprises a tube body in which a flow passage allowing the liquid to pass therein is formed and expanded/contracted due to a change in temperature and restriction members fitted to at least parts of the tube body in the longitudinal direction and restricting the outer diameter of the tube body. In the tube of this structure, the cross sectional areas of the flow passage at portions where the restriction members are fitted are changed according to the expansion/contraction of the tube body due to a change in temperature.</p>
