This work reports on the synthesis, magnetic properties and crystal structure of (NH4)2ReI6. Bright violet (NH4)2ReI6 is tetragonal, P4/mnc (No. 128), a = b = 7.7436(6), c = 11.6403(14) A, Z = 2, Dx = 4.68 g/cm3, T = 100(1) K. The structure was refined to R = 0.074 for 438 reflections observed. The anion [ReI6]2- has an octahedral environment. The temperature dependence of the magnetic susceptibility measured over the range of 4-300 K exhibits the Curie point at 20 K, indicating the presence of antiferromagnetic interaction between the rhenium centres.