Electroosmotic flow pump, electroosmotic flow pump manufacturing method, and microfluidic device

Provided is a novel electroosmotic flow pump that can be driven by an alternating current. An electroosmotic flow pump (2) is provided with a dielectric porous film (21), a first water-permeable electrode (22), a second water-permeable electrode (23), and a hydrophilic layer (22a). The first water-permeable electrode (22) is disposed on one side of the dielectric porous film (21). The second water-permeable electrode (23) is disposed on the other side of the dielectric porous film (21). The hydrophilic layer (22a) is disposed further toward the one side than a center of the dielectric porous film (21), said center being in the thickness direction of the dielectric porous film.