Nitinol is the most popular shape memory alloys which is widely used due to its unique properties such as shape memory effect, superelasticity, wear resistance, corrosion resistance and biocompatibility. But, the problems with the Fabrication of this alloy parts has caused its use to be much lower than expected. Today, additive manufacturing technology and specifically selective laser melting are used as an alternative to fabrication parts. Achieving dense structure and controlling the transformation temperatures of nitinol parts fabricated by selective laser melting method are major challenges for research groups around the world. In the present study, fabrication and control of transformation temperatures of nitinol parts fabricated by selective laser melting was examined. Dimensional accuracy of the parts fabricated by different process parameters have different values. In order to improve the dimensional accuracy of the parts, it was suggested to fabricated with the contour of the parts. The most important factor in achieving the optimum density was the suitability of the volume input energy level. At low scan track spacing, dense structure can be achieved with less volumetric input energy than high scan track spacing. The effect of weight on the parameters affecting the transformation temperatures varies according to the power level. As far as the effect of scan track spacing at high power is greater than low power. Hardness and compressive strength of parts affected by process parameters and structural phase of parts. The best superelastic response was in the partsfabricated by 120 watts power and 50 joules per cubic millimeter volume input energy which returned 99.89% of total strain after applied stress. Keywords Nitinol, selective laser melting, additive manufacturing, nickel-titanium