To simplify the personal employment shift setting correction of an employment data summarization processing program.

This employment data summarization processing program is provided with a data reading means for reading shift schedule data from the other data file and a means for updating preliminarily stored shift schedule data by the shift schedule data read from the other data file. When an employment information reading button 12 is depressed, and the other data file such as a shift schedule table is read, the display data of a shift setting column C displayed in the individual employment execution display window 11 are updated by the read data, and the shift setting in one summarization period is corrected in a batch.