This invention addresses the problem of providing a monitoring device in which excessive notification is minimized and a decision relating to fault prediction can be readily made. A monitoring device (20), provided with: a physical quantity acquisition unit (201) for acquiring a physical quantity indicating the state of the device; an abnormality determination unit (203) for determining whether or not an abnormality is present on the basis of whether or not the acquired physical quantity is within a predetermined range; an abnormality waveform data generator (204) for generating, when it is determined that an abnormality is present, abnormality waveform data indicating the temporal change in the physical quantity during an abnormality waveform period including at least the period up to the point in time at which a predefined accumulation time has elapsed from the point in time at which it is determined that an abnormality is present; and a notification unit (206) for causing a display unit (207) to display the abnormality waveform indicated by the abnormality waveform data.