AUTOMATIC TRANSMISSION CONTROL DEVICE

There is provided a control device (5) for an automatic transmission (4) capable of outputting a torque reduction signal (Str) for reducing the driving torque of a driving source (2) during a transmission shift, in which, when a shift signal (Ss) for an upshift is input with an accelerator opening equal to or more than a threshold and a transmission shift is performed, the torque reduction signal (Str) for reducing the driving torque of the driving source (2) is output so that an inertial torque acting on an input shaft (41a) of a continuously variable transmission mechanism (41) is canceled while a transmission shift ratio is changed and, before the transmission shift ends, a vehicle driving force is reduced to a vehicle driving force after the transmission shift.