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 a drive wheel, the automatic transmission performing a gear shift by switching between gear positions through hydraulic control, and a 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: 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; a regeneration control unit that is configured to control regeneration by the motor; and a clutch control unit that controls the 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 (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 threshold of a predetermined gear shift point is defined to be smaller than the thresholds of gear shift points (D3 to D7) higher than the predetermined gear shift point on the downshift side in the non-cooperative regeneration map (52, 53), and is defined to be smaller than the threshold of the predetermined gear shift point on the downshift side in the cooperative regeneration map, and the thresholds of gear shift points (D3 to D7) higher than the predetermined gear shift point are defined to be an identical value on the downshift side in the cooperative regeneration map. 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; a regeneration control unit that is configured to control regeneration by the motor; and a clutch control unit that controls the 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 (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 threshold of a predetermined gear shift point is defined to be smaller than the thresholds of gear shift points (D3 to D7) higher than the predetermined gear shift point on the downshift side in the non-cooperative regeneration map (52, 53), and is defined to be smaller than the threshold of the predetermined gear shift point on the downshift side in the cooperative regeneration map, and the thresholds of gear shift points (D3 to D7) higher than the predetermined gear shift point are defined to be an identical value on the downshift side in the cooperative regeneration map.