A work vehicle comprising: a controller configured to control the work vehicle; a vehicle body; a running gear configured to cause the vehicle body to travel; and a height adjuster configured to change a height of a center of gravity of the vehicle body, wherein the controller comprises: one or more processors; and one or more memories storing a computer program to be executed by the one or more processors; and wherein the one or more processors is configured or programmed to: acquire, during a turn, information concerning at least one of a turning radius and an angular velocity of the vehicle body; and control the height adjuster to maintain or lower the height of the center of gravity in accordance with the information, characterized in that the controller is configured or programmed to control the height adjuster to lower the center of gravity when a state of a small turn where the turning radius is smaller than a reference radius is entered during a turn, and if the height of the center of gravity is higher than a reference height. a controller configured to control the work vehicle; a vehicle body; a running gear configured to cause the vehicle body to travel; and a height adjuster configured to change a height of a center of gravity of the vehicle body, wherein the controller comprises: one or more processors; and one or more memories storing a computer program to be executed by the one or more processors; and wherein the one or more processors is configured or programmed to: acquire, during a turn, information concerning at least one of a turning radius and an angular velocity of the vehicle body; and control the height adjuster to maintain or lower the height of the center of gravity in accordance with the information, characterized in that the controller is configured or programmed to control the height adjuster to lower the center of gravity when a state of a small turn where the turning radius is smaller than a reference radius is entered during a turn, and if the height of the center of gravity is higher than a reference height. one or more processors; and one or more memories storing a computer program to be executed by the one or more processors; and wherein the one or more processors is configured or programmed to: acquire, during a turn, information concerning at least one of a turning radius and an angular velocity of the vehicle body; and control the height adjuster to maintain or lower the height of the center of gravity in accordance with the information, characterized in that the controller is configured or programmed to control the height adjuster to lower the center of gravity when a state of a small turn where the turning radius is smaller than a reference radius is entered during a turn, and if the height of the center of gravity is higher than a reference height. acquire, during a turn, information concerning at least one of a turning radius and an angular velocity of the vehicle body; and control the height adjuster to maintain or lower the height of the center of gravity in accordance with the information, characterized in that the controller is configured or programmed to control the height adjuster to lower the center of gravity when a state of a small turn where the turning radius is smaller than a reference radius is entered during a turn, and if the height of the center of gravity is higher than a reference height.