To automatically check an abnormality in the number of heart meats, breathing rate and respiratory pulses, etc., when an aged person under care or bathing person faints or drowns in a bathroom.

This device detects the signs of life or judges an abnormality in a bathroom by mounting the piezoelectric sensor on a bathtub in the bathroom and having a means for detecting the respiration of a human body and heart beats and a means for measuring the breathing rate and the number of pulses.