The results of investigations of stress-induced intermartensitic transformations in [012]-oriented Ni54Fe19Ga27 (at.%) single crystals are presented as a function of testing temperature and applied stresses. The sequence of intermartensitic transformations L21–14M–L10 at Т 423 K. The interval of superelasticity development is controlled by the high value of α2–1 = dσcr/dT = 3.1 MPa/K and on the side of high temperatures is limited by the strength properties of the martensite phase; superelasticity is observed during L21–14M–L10-transformations below 353 K. It is experimentally found out that with increasing temperature and externally applied stresses the value of reversible transformation-induced strain is decreased, while the stress hysteresis is increased, and the interval of the forward transformation under loading becomes larger than that of the reverse.