The current-voltage characteristics of the C70 solid with hexagonal closed-packed structures were measured in the temperature range of 250–450 K. The current-voltage characteristics can be described as a temporary expedient by a cubic polynomial of the voltage, i=av3+bv2+cv+d. Moreover, the Meyer-Neldel temperature of the C70 solid was confirmed to be 310 K, at which a linear relationship between the current and voltage was observed. Also, at temperatures below the Meyer-Neldel temperature, the current increases with increasing voltage. On the other hand, at temperatures above the Meyer-Neldel temperature a negative differential conductivity effect was observed at high voltage side. The negative differential conductivity was related to the electric field and temperature effects on the mobility of charge carrier, which involve two variations in the carrier concentration and the activation energy for carrier hopping transport.