The present invention provides a metal hydride canister apparatus having structures capable of discharging hydrogen gas uniformly and exchanging heat effectively, comprising: a shell having a joint arranged in a central hole located on top of the shell, and two via holes arranged respectively at a side of the central hole; a filtering rod connecting to the joint; a pipe having a first end, a second end and a middle section between the first end and the second end; and a metal hydride stored inside the shell; wherein, the first end and the second end of the pipe pass the corresponding via hole in respective, and the middle section of the pipe forms a twin spiral structure wrapping around the filtering rod, the middle section having a first loop interconnecting to a second loop. In a preferred embodiment of the present invention, the filtering rod can be a hollow rod extending toward the bottom of the shell, and is welded on the joint that is further welded to the central hole, in addition, the first end and the second end of the pipe are welded onto the corresponding via holes and are exposed to the outside of the shell, and the first loop and the second loop of the middle section can have equal diameters or different diameters.