Gear shift control device of vehicle

A gear shift control device of a vehicle including an engine and a motor installed as driving sources, an automatic transmission provided between the driving sources and drive wheels, the automatic transmission performing a gear shift by switching between high and low gear positions through hydraulic control, and a relay clutch provided between the engine and the automatic transmission to enable the engine to be disconnected from the automatic transmission, the gear shift control device comprising:

• memory storing a gear shift map that defines, for each of gear shift points, thresholds of a number of revolutions on a downshift side and on an upshift side to determine a switching start timing of each of the gear positions;
• one or more processors configured to:
• switch between the gear positions based on the gear shift map;
• control regeneration by the motor;
• and
• control the relay clutch,
• wherein the gear shift map includes a cooperative regeneration map used in cooperative regeneration that cooperates with a brake, and a non-cooperative regeneration map used in other than cooperative regeneration, the non-cooperative regeneration map defining thresholds of revolutions lower than thresholds in the cooperative regeneration map, and
• wherein a threshold of a predetermined low gear shift point is defined to be smaller than thresholds of gear shift points higher than the predetermined low gear shift point on the downshift side in the non-cooperative regeneration map, and is defined to be smaller than a threshold of the predetermined low gear shift point on the downshift side in the cooperative regeneration map.