Electrical resistivity (&rgr;) of glassy (FexNi100−x)80B20(x=30, 40, 50, 60, 70) has been studied as a function of temperature (T) between 300 and 1000 K using heating rates of ∼2.5 K/min. The slopes of the &rgr; vs T curves are positive for all the alloys in their glassy state. At the crystallization temperature the quantity &rgr; abruptly decreases. This decrease increases rapidly with the Fe content. No anomalies in the &rgr; vs T curves are observed at the corresponding Curie temperatures. For the sample containing 40 at.&percent;Fe, &rgr; ∼ T between 300 and 600 K. All other samples show considerable deviations from this relationship. The quantity d&rgr;/dT at 400 K increases with increasing &rgr; at 400 K for alloys with x = 40, 50, 60, and 70. The crystallization temperatures determined from the &rgr; vs T plots are in good agreement with values obtained by other techniques. A few comments are made on the nature of crystallization processes in this system.