A drive controller for controlling driving of a movable optical member of a lens apparatus, including: a position acquirer acquiring a position of the movable optical member; an instruction inputter receiving a first driving command for driving the movable optical member from an external apparatus; and a controller determining a driving amount so that the movable optical member is driven to a position different from a position corresponding to the first driving command based on the first driving command and the position of the movable optical member every unit time, and outputs a second driving command to the lens apparatus so that the movable optical member is driven by the driving amount within the unit time, wherein the controller sets the driving amount within the unit time larger as a difference between the position corresponding to the first driving command and the position of the movable optical member becomes larger.