To provide a droplet ejection device capable of preventing problems such as the degeneration and degradation of a liquid material in a pipe caused by light, of highly accurately ejecting a droplet, and of allowing an operator to properly observe the liquid material in the pipe if necessary, and a liquid-material feed pipe for use in the droplet ejection device.

The droplet ejection device includes a pipe 81 for feeding a liquid material L to a droplet ejection head, a shutter 82 that is disposed on the outer circumferential face of a flow path in the pipe 81 and is constituted of a liquid crystal layer 827 including a liquid crystal material and of a pair of polarizing layers 821, 822 each disposed on either side of the liquid crystal layer 827, and a voltage applying means 84 for applying an electric field onto the liquid crystal layer 827. The shutter 82 is changed into a light-shielding state of shielding external light from entering the flow path, or entering a light-transmitting state of allowing external light to pass therethrough into the flow path enabling an operator to observe the liquid material therein, according to the operating state of the voltage applying means 84.