Porous NiTi shape memory alloy (SMA) used for human implant is a new kind of biomaterial with great prospect. In this paper, porous NiTi SMA with unique interconnected three-dimensionally, uniform pore structure was fabricated by combustion synthesis The as-synthesized porous NiTi SMA exhibited characteristics of superelasticity (SE), which as investigated by stress-strain measurement and X-ray diffraction (XRD). The stress hysteresis increased with increasing applied strain and decreased during the initial loading-unloading cycles, but became stable in subsequent cycles.