A non-transitory computer-readable recording medium stores a production plan preparation support program. The production plan preparation support program causes a computer to execute a process including: displaying a Gantt chart including a plurality of task objects in a first window area and a second window area; and displaying, when detecting an operation of selecting a task object on the Gantt chart displayed in the first window area and disposing the task object on the Gantt chart displayed in the second window area, a result of moving the task object on the Gantt chart displayed in the first window area and the second window area, in a position where the task object is disposed on the Gantt chart displayed in the second window area.
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