An input device of a washing machine and a control method of the same are disclosed. An input device of a washing machine includes an operation part generating a plurality of identical signals for washing course designation, a control part controlling one of a plurality of preset washing courses to be designated sequentially according to a predetermined order if the signal is generated by the operation part and a display part displaying the washing course designated by the control part. A control method of an input device of a washing machine for washing course selection includes generating a plurality of identical signals by a user's operation, designating one of a plurality of preset washing courses separately according to a predetermined order whenever the signal is generate, and displaying the designated washing course.