The exhalation measurement device of certain implementations comprise a chamber, a measurement component, a piezoelectric pump, a first learning controller, and a second learning controller. The chamber may temporarily hold exhalation. The measurement component may measure a specific component in the exhalation. The piezoelectric pump may supply the measurement component with the exhalation held in the chamber. The first learning controller may perform operational setting on the piezoelectric pump before the piezoelectric pump supplies the exhalation in the chamber to the measurement component. The second learning controller may perform operational setting on the piezoelectric pump after the piezoelectric pump has started supplying the exhalation in the chamber to the measurement component, but before the measurement component performs its measurement.
