A gear shift control device of a vehicle including an engine and a motor installed as driving sources, and an automatic transmission provided between the driving sources and a drive wheel, the automatic transmission performing a gear shift by switching between gear positions through hydraulic control, the gear shift control device comprising: a gear shift map that defines, for each of gear shift points, thresholds of the number of revolutions of an input shaft of the automatic transmission on a downshift side and on an upshift side to determine a switching start timing of each of the gear positions; a transmission control unit that is configured to switch between the gear positions based on the gear shift map; and a regeneration control unit that is configured to control regeneration by the motor, 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 (52, 53) used in other than cooperative regeneration, the non-cooperative regeneration map (52, 53) defining the thresholds of revolutions lower than the thresholds in the cooperative regeneration map, the non-cooperative regeneration map (52, 53) includes a first map that defines the thresholds of relatively lower revolutions and is used when an accelerator is not used, and a second map that defines the thresholds of relatively higher revolutions and is used when the accelerator is used, and wherein the thresholds of higher gear shift points (D3 to D7) among the gear shift points (D1 to D7) are defined to be an identical value on the downshift side in the cooperative regeneration map and the second map, the higher gear shift points being higher than a predetermined lower gear shift point. a gear shift map that defines, for each of gear shift points, thresholds of the number of revolutions of an input shaft of the automatic transmission on a downshift side and on an upshift side to determine a switching start timing of each of the gear positions; a transmission control unit that is configured to switch between the gear positions based on the gear shift map; and a regeneration control unit that is configured to control regeneration by the motor, 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 (52, 53) used in other than cooperative regeneration, the non-cooperative regeneration map (52, 53) defining the thresholds of revolutions lower than the thresholds in the cooperative regeneration map, the non-cooperative regeneration map (52, 53) includes a first map that defines the thresholds of relatively lower revolutions and is used when an accelerator is not used, and a second map that defines the thresholds of relatively higher revolutions and is used when the accelerator is used, and wherein the thresholds of higher gear shift points (D3 to D7) among the gear shift points (D1 to D7) are defined to be an identical value on the downshift side in the cooperative regeneration map and the second map, the higher gear shift points being higher than a predetermined lower gear shift point.