Using the Mo¨ssbauer technique, we have measured the electric quadrupole and magnetic dipole hyperfine interaction of61Ni in NiCr2O4. The magnetic transition temperature and the saturation magnetic hyperfine field were determined to be 69±2 K and 442±3 kOe, respectively. The temperature dependence of the reduced field can be reproduced by a Brillouin function withS=1. With the onset of the magnetic ordering, the electric quadrupole interaction parameter changes by a factor of about −2, which indicates that the spin of the Ni2+ion is parallel to the [a,b] plane of the crystal.