A data outputting apparatus of a semiconductor integrated circuit if presented for use in standardizing output timing brought about by different electrical output path lengths. The apparatus includes a data clock signal generating section and a data output section. The data clock signal generating section is configured to use an external clock signal in order to generate a plurality of data clock signals in which output timings of the data clock signals vary depending on a data output mode. The data output section is configured to be controlled by the plurality of data clock signals to output inputted data to the outside through a plurality of data input/output pads that have different path lengths.