According to an embodiment, a pulse measuring device includes a pulse detecting unit, an amplitude calculating unit, an interval calculating unit, an extracting unit, and a determining unit. The pulse detecting unit is configured to detect a pulse of a subject. The amplitude calculating unit is configured to calculate an amplitude of the pulse. The interval calculating unit is configured to calculate an interval of the pulse. The extracting unit is configured to extract a fluctuation variation component which varies in operative association with breathing of the subject from the interval. The determining unit is configured to determine that an apnea event occurs when the amplitude or the interval is reduced at a first time and the fluctuation variation component is reduced at a second time which is immediately before the first time.
