the present invention is intended to provide an information processing device adapted to rapidly register thereinto a schedule , a schedule inputting method for use in the information processing device , and a schedule inputting program used in the information processing device . the information processing device comprises : input controlling means for receiving an input ; numeric value deciding means for deciding whether an inputted numeric value can be identified as a time based on the number of digits of the inputted numeric value and a value of each digit of the inputted numeric value and for identifying the numeric value as a scheduled time in the case where the numeric value is identifiable as the time ; timer means for acquiring the current time ; comparator means for shifting the scheduled time into the future by only a period which is spent until the scheduled time reaches the same time in the future in the case where the scheduled time is represented to be previous to the current time ; and schedule management means for register the scheduled time and a predetermined schedule content as a schedule .