To provide a slip output method for facilitating the operation of the output function of date data and diversifying the output form of the date data in a slip definition function.

In a slip output processing performed to slip data stored in a slip data memory 4 inside a RAM 4, a CPU 2 discriminates the kind of the date of the date data inputted to respective cells inside the slip of the output object and obtains output form information corresponding to the discriminated kind of the date of the date data from a definition table 4c inside the RAM 4. Then, at the time of outputting the slip data, by the output form corresponding to the obtained output form information, the cell to which the date data are inputted or a cell area including the cell to which the date data are inputted is color displayed and outputted by a color display part 8 or color printed and outputted by a color printing part 8.