1. A steering control device comprising: a steering operating unit which can be steered through a plurality of different motions; and a control unit which performs steering control of a vehicle through a plurality of operation systems corresponding to the plurality of motions on the basis of an input value input by each of the plurality of motions, wherein, when adjusting a reference point of a motion in at least one operation system from among the plurality of operation systems, the control unit adjusts the reference point under the condition that the absolute value of an operating amount in at least one operation system from among operation systems other than the operation system where the reference point is adjusted is smaller than a predetermined value.