The present invention relates to an exhalation measurement device that is used in checking pulmonary function, diagnosing asthma, and so forth, and it is an object thereof to perform zero point correction accurately even when there is disturbance. To achieve this object, the exhalation measurement device of the present invention comprises a flow regulator (4). The flow regulator (4) comprises a first offset adjuster (40) that puts an exhalation inflow component (9) and an exhalation outflow component (10) in a separated state and performs first offset adjustment of an inflow pressure sensor (13) and an outflow pressure sensor (14), a voltage difference detector (41) that puts the exhalation inflow component (9) and the exhalation outflow component (10) in a linked state and detects an output voltage difference after the first offset adjustment of the inflow pressure sensor 813) and the outflow pressure sensor (14), and a second offset adjuster (43) that uses the output voltage difference to perform second offset adjustment of the inflow pressure sensor (13).
