Method for controlling gear-shifting in an electric vehicle, wherein: (a) in the electric vehicle a motor-generator for implementing regeneration during deceleration and an automatic transmission having a meshing clutch as a shifting element are provided in an electric vehicle's drivetrain extending from a drive source to a drive wheel in the electric vehicle; the method comprises steps for (b) gear-shift request assessment (S1, S2; S21, S22) for assessing whether a gear-shift request made during regeneration is an upshift in which a disengaging element during re-engagement gear-shifting is the meshing clutch or a downshift in which an engaging element during a re-engagement gear-shifting is the meshing clutch; (c) gear-shifting permission assessment (S4, S24) for assessing, when a re-engagement gear-shift request involving disengaging or engaging the meshing clutch is made during regeneration, whether to grant shift permission based on whether or not a deceleration fluctuation occurring as a result of the re-engagement gear-shifting is less than a predetermined deceleration fluctuation; and (d) initiating gear-shifting (S5, S25) according to the gear-shift request when the gear-shifting permission assessment step (S4, S24) decides to grant gear-shifting permission; (e) when loss in torque transmitted through the drivetrain occurs, due to a neutral state being entered during a re-engagement gear-shift transitional period using the meshing clutch, the gear-shifting permission assessment step (S4, S24) sets, via a regeneration torque threshold value calculation, a regeneration torque threshold value, (f) the regeneration torque threshold value calculation determines the predetermined deceleration fluctuation and calculates the regeneration torque threshold value based on the predetermined deceleration fluctuation, a gear ratio of a pre-shift gear stage, and vehicle factors; (g) the gear-shifting permission assessment step (S4, S24) uses a regeneration torque and permits gear-shifting when a current regeneration torque is less than the regeneration torque threshold value, and (h) the regeneration torque threshold value calculation sets a higher predetermined deceleration fluctuation as the vehicle speed increases. (a) in the electric vehicle a motor-generator for implementing regeneration during deceleration and an automatic transmission having a meshing clutch as a shifting element are provided in an electric vehicle's drivetrain extending from a drive source to a drive wheel in the electric vehicle; (b) gear-shift request assessment (S1, S2; S21, S22) for assessing whether a gear-shift request made during regeneration is an upshift in which a disengaging element during re-engagement gear-shifting is the meshing clutch or a downshift in which an engaging element during a re-engagement gear-shifting is the meshing clutch; (c) gear-shifting permission assessment (S4, S24) for assessing, when a re-engagement gear-shift request involving disengaging or engaging the meshing clutch is made during regeneration, whether to grant shift permission based on whether or not a deceleration fluctuation occurring as a result of the re-engagement gear-shifting is less than a predetermined deceleration fluctuation; and (d) initiating gear-shifting (S5, S25) according to the gear-shift request when the gear-shifting permission assessment step (S4, S24) decides to grant gear-shifting permission; (e) when loss in torque transmitted through the drivetrain occurs, due to a neutral state being entered during a re-engagement gear-shift transitional period using the meshing clutch, the gear-shifting permission assessment step (S4, S24) sets, via a regeneration torque threshold value calculation, a regeneration torque threshold value, (f) the regeneration torque threshold value calculation determines the predetermined deceleration fluctuation and calculates the regeneration torque threshold value based on the predetermined deceleration fluctuation, a gear ratio of a pre-shift gear stage, and vehicle factors; (g) the gear-shifting permission assessment step (S4, S24) uses a regeneration torque and permits gear-shifting when a current regeneration torque is less than the regeneration torque threshold value, and (h) the regeneration torque threshold value calculation sets a higher predetermined deceleration fluctuation as the vehicle speed increases.