A vehicle gear-shifting control apparatus for a vehicle, comprising: an engine which is configured to generate a travel drive force of the vehicle; a motor which is configured to generate a drive force of the vehicle and which is configured to supply a battery with regenerative energy during deceleration of the vehicle; a hydraulically controlled automatic transmission which has an input shaft connected to the engine and the motor and an output shaft connected to a rear wheel of the vehicle and which is configured to subject an input rotation to gear-shifting or speed-changing at a transmission gear ratio corresponding to a selected shift stage and is configured to output a rotation; a hydraulically controlled friction brake system which is configured to distribute a braking force to a front wheel and the rear wheel of the vehicle in order to realize braking during a brake pedal operation by a driver; and a controller which is configured to execute, during deceleration of the vehicle, gear-shifting control of changing the shift stage by outputting a gear-shifting signal in accordance with a rotation speed of the input shaft to the automatic transmission and regeneration control of performing regeneration by at least one of distributing the braking force by the friction brake system and imparting a regenerative braking torque to the rear wheel by causing the motor to perform a regeneration operation, wherein when it is determined that the vehicle is in a slip state during the regeneration control, the controller is configured to: execute a first type of gear-shifting control as the gear-shifting control, during distribution of the braking force by the friction brake system, by reducing hydraulic pressure in the friction brake system so as to reduce the braking force to be distributed to the rear wheel and by changing the shift stage while continuing the regeneration operation of the motor; and execute a second type of gear-shifting control as the gear-shifting control, during non-distribution of the braking force by the friction brake system, by increasing an input torque of the input shaft so that the regenerative braking torque decreases and by changing the shift stage while continuing the regeneration operation of the motor. an engine which is configured to generate a travel drive force of the vehicle; a motor which is configured to generate a drive force of the vehicle and which is configured to supply a battery with regenerative energy during deceleration of the vehicle; a hydraulically controlled automatic transmission which has an input shaft connected to the engine and the motor and an output shaft connected to a rear wheel of the vehicle and which is configured to subject an input rotation to gear-shifting or speed-changing at a transmission gear ratio corresponding to a selected shift stage and is configured to output a rotation; a hydraulically controlled friction brake system which is configured to distribute a braking force to a front wheel and the rear wheel of the vehicle in order to realize braking during a brake pedal operation by a driver; and a controller which is configured to execute, during deceleration of the vehicle, gear-shifting control of changing the shift stage by outputting a gear-shifting signal in accordance with a rotation speed of the input shaft to the automatic transmission and regeneration control of performing regeneration by at least one of distributing the braking force by the friction brake system and imparting a regenerative braking torque to the rear wheel by causing the motor to perform a regeneration operation, wherein when it is determined that the vehicle is in a slip state during the regeneration control, the controller is configured to: execute a first type of gear-shifting control as the gear-shifting control, during distribution of the braking force by the friction brake system, by reducing hydraulic pressure in the friction brake system so as to reduce the braking force to be distributed to the rear wheel and by changing the shift stage while continuing the regeneration operation of the motor; and execute a second type of gear-shifting control as the gear-shifting control, during non-distribution of the braking force by the friction brake system, by increasing an input torque of the input shaft so that the regenerative braking torque decreases and by changing the shift stage while continuing the regeneration operation of the motor. execute a first type of gear-shifting control as the gear-shifting control, during distribution of the braking force by the friction brake system, by reducing hydraulic pressure in the friction brake system so as to reduce the braking force to be distributed to the rear wheel and by changing the shift stage while continuing the regeneration operation of the motor; and execute a second type of gear-shifting control as the gear-shifting control, during non-distribution of the braking force by the friction brake system, by increasing an input torque of the input shaft so that the regenerative braking torque decreases and by changing the shift stage while continuing the regeneration operation of the motor.