A vehicular input manipulation apparatus has a target parameter switchover manipulating device and a setup changeover manipulating device in order to change setup contents of several control parameters for drive control of an in-vehicle apparatus. The target parameter switchover manipulating device executes switchover to designate one of the control parameters as a change target control parameter. The setup changeover manipulating device changes a setup content relative to the change target control parameter. When a control mode of the in-vehicle apparatus is changed into a predetermined control mode, a control circuit automatically enforces switchover relative to the change target control parameter by automatically replacing the control parameter, which has been designated as the change target control parameter, with an enforcement change target control parameter, which is a predetermined control parameter associated with the predetermined control mode.