A portable terminal includes a breath determining unit that, when having detected sounds having similar frequency components periodically in picked-up sounds by a microphone while an object person is being asleep, determines the sounds to be breath sounds. The terminal includes a snore determining unit that, when the sound pressure of the breath sounds is greater than a first level threshold value, determines the sounds to be a snoring sound. The terminal includes a body motion determining unit that determines whether a body motion is detected after the breath sound are determined. The terminal further includes an apnea determining unit that determines whether a silent interval is detected from a period of time between timings of the breath sound and the body motion when the body motion is detected and that determines the silent interval to be an apnea state when the silent interval is detected.
