We developed a self-operated paper pump that can maintain a nearly constant flow rate of an aqueous solution along a paperstrip channel in paper-based analytical devices (PADs). The quasi-stationary flow rate was controlled by increasing the crosssectional channel area (capillary force) using a fan-shaped absorption pad coupled with a paper strip channel. The flow rateis regulated by varying the fan angle of the circular absorbing pad. Furthermore, the flow rate can be increased by furnishinga hollow cavity at the center of a conventional paper strip channel. The rate was regulated by varying the length of the hollowpaper channel in the flow rate range of 5.1–26.4 mm/min. As a preliminary work, a paper-pump-coupled PAD was fabricated,and its CV detection capability was evaluated for the redox reaction of Fe(CN)6+4/+3. The combination of a paper pump witha PAD resulted in an ideal CV curve with a higher limiting current and faster response time. These results are interpreted wellby the Levich equation, which suggests that the paper pump is a very useful component in paper-based sensors.