A shift control device of a vehicular automatic transmission, if during a
first shift in a power-off state, a second shift judgment for a second
shift that is a power-on downshift is made, performs a second shift
control of lowering an input shaft rotation speed to a synchronous
rotation speed of a post-second shift gear step through an engagement
control of the friction engagement devices, and when the second shift is
performed, performs a control of reducing a throttle valve opening degree
of the engine to a predetermined degree that causes the engine to output
a torque that is able to bring the input shaft rotation speed to a
rotation speed that is higher than the synchronous rotation speed of the
post-second shift gear step. The control device also executes a
retardation control of retarding an ignition timing of the engine when
the input shaft rotation speed is dropped through the second shift
control.