Provided are a variator (20) and a transmission controller (12) in an engine-driven vehicle. The transmission controller (12) has an instantaneous interruption recovery control portion ( FIG. 4 ) configured to, upon a power reset from an instantaneous interruption during running, set a target through transmission ratio (vRATIO0) and a desired through transmission ratio (vDRATIO) to a lowest transmission ratio value by initialization and perform recovery control to recover an actual through transmission ratio (vRATIO) of the variator (20) to a transmission ratio value for shifting to normal control. The instantaneous interruption recovery control portion ( FIG. 4 ) is further configured to, upon the power reset from the instantaneous interruption during the running, set a change speed of the target through transmission ratio (vRATIO0) from the lowest transmission ratio value to the desired through transmission ratio (vDRATIO), to be higher than that under the normal control, before a time at which the desired through transmission ratio value (vDRATIO) deviates from the lowest transmission ratio value.