INJECTION DEVICE

An injection apparatus (6) includes a container (62), a liquid ammonia supply part (69) for supplying a predetermined amount of liquid ammonia into the container (62), a compression part (65) connected to the container (62) and for compressing a gas filled in a space for compression to introduce the compressed gas into the container (62), and a nozzle (66) connected to the container (62) and for introducing into a combustion chamber ammonia that is pushed out of the container (62) due to the introduction of the compressed gas into the container (62). The injection apparatus (6) uses a gas that is heated to a high temperature by compression to inject ammonia into the combustion chamber and thus can easily produce the combustion of ammonia in the combustion chamber.