Electrical conductivity of the molten binary CsCl–DyCl3 system has been measured in the temperature range of 898–1233 K. There were given equations of temperature dependences of specific and molar conductivities of melts for 0 ≤ xDyCl3 ≤ 1. Dependence of the CsCl–DyCl3 system conductivity on the melt composition was compared with sodium and potassium analogues as well as CsCl–light lanthanide ones (La–Pr). It was found that the minimum of molar conductivity in the CsCl–DyCl3 system is at typical composition of the melt (xDyCl3 = 0.40–0.50) but further increase of the melt conductivity is apparently weaker. The results have been briefly commented in terms of literature findings on the lanthanide halides–alkali metal halide system structure.