A leaning vehicle comprising: a body frame that is leanable leftward or rightward; a left wheel and a right wheel that are arranged side by side in a left-right direction of the body frame; a power source configured to supply a driving force to the leaning vehicle, a wheel disposed ahead of or behind the left wheel and the right wheel in a front-rear direction of the body frame, a leaning suppression mechanism configured to change a resisting force to be applied against leaning of the body frame; an in-stop operation system which is designed to be activated in order to improve a convenience of the rider when the rider stops the leaning vehicle and configured to be activated in a case where a velocity of the leaning vehicle is less than a first velocity; and a control unit configured to activate the in-stop operation system even though the velocity is no less than the first velocity, in a case where an activating condition for the leaning suppression mechanism is satisfied or an activation of the leaning suppression mechanism is detected, characterized by an actuation member adapted to be operated by a rider, the leaning suppression mechanism is configured to be activated in accordance with an operation of the actuation member to change a resisting force to be applied against leaning of the body frame, wherein the in-stop operation system includes a mileage improving system configured to reduce an operation amount of the power source, and/or the in-stop operation system includes a brake assisting system configured to suppress rotation of at least one of the left wheel, the right wheel, and the wheel disposed ahead of or behind the left wheel and the right wheel. a body frame that is leanable leftward or rightward; a left wheel and a right wheel that are arranged side by side in a left-right direction of the body frame; a power source configured to supply a driving force to the leaning vehicle, a wheel disposed ahead of or behind the left wheel and the right wheel in a front-rear direction of the body frame, a leaning suppression mechanism configured to change a resisting force to be applied against leaning of the body frame; an in-stop operation system which is designed to be activated in order to improve a convenience of the rider when the rider stops the leaning vehicle and configured to be activated in a case where a velocity of the leaning vehicle is less than a first velocity; and a control unit configured to activate the in-stop operation system even though the velocity is no less than the first velocity, in a case where an activating condition for the leaning suppression mechanism is satisfied or an activation of the leaning suppression mechanism is detected, characterized by an actuation member adapted to be operated by a rider, the leaning suppression mechanism is configured to be activated in accordance with an operation of the actuation member to change a resisting force to be applied against leaning of the body frame, wherein the in-stop operation system includes a mileage improving system configured to reduce an operation amount of the power source, and/or the in-stop operation system includes a brake assisting system configured to suppress rotation of at least one of the left wheel, the right wheel, and the wheel disposed ahead of or behind the left wheel and the right wheel.