Abstract: Provided is a vital sign measuring apparatus capable of measuring vital signs such as a temperature of a human body, breathing, acceleration, oxygen saturation, voice, etc. to analyze and display a health index. The diaper-type vital sign measuring apparatus includes a vital sign measuring part for detecting variation in abdominal circumference according to breathing of a wearer to measure a vital sign of the breathing of the wearer, a vital sign analysis part for analyzing the vital sign measured by the vital sign measuring part to calculate a health index of the wearer, and a display part for displaying the health index calculated by the vital sign analysis part.