Abstract: A fluid injection device that effectively injects fluid into an external circumfluid unit, for example, a thin-film EL panel requiring injection of moisture-proof oil. There is disclosed an extremely convenient fluid injection device that can repeatedly perform fluid injections without replacing the fluid injection pipe merely by pressing the fluid injection pipe against the fluid receiver part using a clip. The preferred embodiment uses such a clip freely mountable and removable, which elastically sandwiches a joint pipe by a flange portion and the fluid receiver part so that the opening in the tip portion of the fluid injection pipe can be tightly pressed against the fluid receiver part.