Provided is a signal measuring apparatus for measuring a first input signal and a second input signal. The signal measuring apparatus is provided with a first measuring section for measuring the first input signal in a plurality of strobe timings arranged in each measurement cycle; a second measuring section for measuring the second input signal in a plurality of strobe timings arranged in each measurement cycle; and a phase difference calculating section for calculating a phase difference between the first input signal and the second input signal in each measurement cycle, based on the measurement results obtained by the first measuring section and the second measuring section; and a distribution generating section for generating distribution information of the phase difference calculated by the phase difference calculating section in each measurement cycle.
