Provided is a signal measurement apparatus, including sampling sections that each sample a signal under measurement having a cycle T with a threshold value, where the threshold values of at least two of the sampling sections are different from each other; a waveform reconfiguring section that shapes a reconfigured waveform having the cycle T by rearranging ordinal ranks of sample values corresponding to each threshold value obtained by the sampling sections, a distribution generating section that generates a timing distribution of edges in the reconfigured waveform corresponding to each threshold value; and a calculating section that calculates rise time or fall time of the signal under measurement based on the timing distribution corresponding to each threshold value.