The temperature dependence of the57Fe hfs in FeF2has been obtained with the Mo¨ssbauer effect in the region below the Ne´el temperature. In the low‐temperature region (0°−50°K) the present measurements are in good agreement with the more precise determination of the temperature dependence of the19F NMR by Jaccarino. In the region just below the Ne´el temperature the data were analyzed in terms of the equationH(T)=H(0)D(1−T/TN)&bgr;,yielding &bgr;=0.325±0.005 andD=1.36±0.03. This value of &bgr; differs slightly but not significantly from that found in MnF2by Heller.Dis larger than those previously reported in other materials because of the larger magnetic anisotropy in FeF2.