Abstract: A vibration diagnosis device is configured to diagnose vibration of a diagnosis target on the basis of an input signal from outside. The vibration diagnosis device includes a vibration sensor configured to detect the vibration of the diagnosis target, a filtering unit configured to extract a prescribed wavelength band from a waveform of a signal detected by the vibration sensor, and an arithmetic processing unit configured to apply a frequency analysis to the filtered waveform, which is obtained by the filtering unit, to generate spectral data. When, on the basis of the input signal, the arithmetic processing unit does not generate the spectral data, the arithmetic processing unit calculates at least one fundamental vibration statistic from the waveform of the signal detected by the vibration sensor and diagnoses the presence/absence of an abnormality of the diagnosis target.