A cell-library-for-statistical-timing-analysis creating apparatus includes: a unit that groups cells into groups of cells each having the same topology; a unit that selects representative cells from the respective grouped cell group; a unit that sets one or more kinds of signal transition time information based on output signal transition time and input signal transition time; a unit that calculates, for each of the representative cells, an output load capacitance and input signal transition time for each of kinds of signal transition time information; a unit that executes circuit simulation using the output load capacitance and the input signal transition time and calculates a delay variation amount; a unit that calculates delay variation information based on a delay average and the delay variation amount; and a unit that outputs association for each of the representative cells between the signal transition time information and the delay variation information.
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