The care-data entry interface for the Home Helper support system was improved to entry the data and to create the care report. The system consists of a Java mobile phone for the Home Helper and a conventional server computer at the Home Helper's office.The operation of scroll-up key, used as the care-data entry interface, was compared with that of the dial key in terms of the time to create the report. The questionnaire has been made to helpers concerning their easiness of operation. The time to create the care report with dial key operation was shorter by 58% than that with the scroll-up one. The questionnaire results indicated that the easiness of operations were the similar with both cases. Therefore, the comparison study found the dial key operation to be very suitable for easy and rapid data entry.