To provide a physical information measurement apparatus and a physical information measurement program, suppressing influence of a body motion and detecting a biosignal weaker than a body motion signal, even if there is the body motion in time of the detection.

This physical information measurement apparatus 1 detects prescribed physical information from an input signal which includes the detection target biosignal having periodicity and where a plurality of biosignals having different strength are mixed. The physical information measurement apparatus 1 includes: an amplitude compression part 12 performing compression processing of only an amplitude of each wave of the input signal having the strength exceeding a threshold value determined according to the detection target biosignal, and bringing the amplitude of the wave having the strength within the threshold value into a state as it is; and a signal analysis part 13 analyzing an output signal from the amplitude compression part 12, and outputting the prescribed physical information.