To change a shape of a liquid-conducting material for supplying liquid retained in a liquid-retaining part to a liquid-jetting part at a middle portion thereof.

The liquid-conducting material includes a long base material 110 having a plurality of ridges 111 arranged along the length direction in parallel with a space and composing a flexible material, a first planar long material 120 having flexibility, covering the upper surface of the ridges and bonded to the base material along the width direction of the base material, and a flow passage of the liquid constructed by the spaces between a plurality of the ridges 111 and the first planar long material 120, wherein each ridge 111 is formed such that the cross sectional area in a part of the flow passage in the length direction is smaller than that of the remaining portion.