Abstract: Pulmonary exerciser device is provided whereby in one embodiment respective inspiratory and expiratory stages are stacked, the former above the latter, in a generally vertical, elongated tubular chamber. The patient pulmonary system is coupled to an intermediate point, and respective balls are carried in the expiratory and inspiratory chambers. Patient inhalation raises the lower ball, and patient exhalation raises the upper ball. Indicia are provided for incentive motivation and measurement of inspiration flow rate. Inspiration only is provided in other devices with provision for measurement and recording. In other devices, expiratory exercise is provided, with or without inspiratory exercise.