A leaning vehicle that is configured to lean leftward when turning to the left and to lean rightward when turning to the right, the leaning vehicle comprising: a vehicle body; a plurality of wheels (3, 4) including a front wheel and a rear wheel; a driving source configured to supply a driving force to at least one of the front wheel or the rear wheel; an accelerator opening degree adjuster configured to adjust the driving force generated in the driving source in accordance with an accelerator opening degree; a speed detector configured to detect vehicle speed of the leaning vehicle; a gear-type multi-stage automatic transmission (12, 312) including a plurality of gear stages and a clutch (40, 340, 360), and configured to change the driving force transferred to at least one of the front wheel or the rear wheel from the driving source by automatically changing the plurality of gear stages stepwise; and a gear-shift controller (7, 107, 207, 307) configured to control changing of the plurality of gear stages in the multi-stage automatic transmission (12, 312), based on a value related to the accelerator opening degree and the vehicle speed, wherein the gear-shift controller (7, 107, 207, 307) is configured to shift up the gear stages of the multi-stage automatic transmission (12, 312) from the first gear stage to the second gear stage, in a case where the leaning vehicle turns in a lean state in which the leaning vehicle leans with respect to a vertical line of a road surface in a left direction or in a right direction about a rotation axis extending in a front-rear direction of the leaning vehicle as a center, when the vehicle speed at a time when the value related to the accelerator opening degree is a predetermined value exceeds a second vehicle speed threshold that is larger than a first vehicle speed threshold at which the gear stages of the multi-stage automatic transmission (12, 312) are shifted up from a first gear stage to a second gear stage in upright traveling of the leaning vehicle, or shift up the gear stages of the multi-stage automatic transmission (12, 312) from the first gear stage to the second gear stage, in a case where the leaning vehicle turns in the aforementioned lean state, when the value related to the accelerator opening degree at a time when the vehicle speed is a predetermined vehicle speed exceeds a second accelerator opening degree related threshold that is smaller than a first accelerator opening degree related threshold at which the gear stages of the multi-stage automatic transmission (12, 312) are shifted up from the first gear stage to the second gear stage in upright traveling of the leaning vehicle. a vehicle body; a plurality of wheels (3, 4) including a front wheel and a rear wheel; a driving source configured to supply a driving force to at least one of the front wheel or the rear wheel; an accelerator opening degree adjuster configured to adjust the driving force generated in the driving source in accordance with an accelerator opening degree; a speed detector configured to detect vehicle speed of the leaning vehicle; a gear-type multi-stage automatic transmission (12, 312) including a plurality of gear stages and a clutch (40, 340, 360), and configured to change the driving force transferred to at least one of the front wheel or the rear wheel from the driving source by automatically changing the plurality of gear stages stepwise; and a gear-shift controller (7, 107, 207, 307) configured to control changing of the plurality of gear stages in the multi-stage automatic transmission (12, 312), based on a value related to the accelerator opening degree and the vehicle speed, wherein the gear-shift controller (7, 107, 207, 307) is configured to shift up the gear stages of the multi-stage automatic transmission (12, 312) from the first gear stage to the second gear stage, in a case where the leaning vehicle turns in a lean state in which the leaning vehicle leans with respect to a vertical line of a road surface in a left direction or in a right direction about a rotation axis extending in a front-rear direction of the leaning vehicle as a center, when the vehicle speed at a time when the value related to the accelerator opening degree is a predetermined value exceeds a second vehicle speed threshold that is larger than a first vehicle speed threshold at which the gear stages of the multi-stage automatic transmission (12, 312) are shifted up from a first gear stage to a second gear stage in upright traveling of the leaning vehicle, or shift up the gear stages of the multi-stage automatic transmission (12, 312) from the first gear stage to the second gear stage, in a case where the leaning vehicle turns in the aforementioned lean state, when the value related to the accelerator opening degree at a time when the vehicle speed is a predetermined vehicle speed exceeds a second accelerator opening degree related threshold that is smaller than a first accelerator opening degree related threshold at which the gear stages of the multi-stage automatic transmission (12, 312) are shifted up from the first gear stage to the second gear stage in upright traveling of the leaning vehicle.