This fluid handling device (micro fluid chip (100)) comprises a first chip (110) and a second chip (120). The first chip (110) includes: a first base plate (111); a first channel (113); a second channel (114); and a partition wall (116) and a first film (112), which are disposed between the channels. The second chip (120) includes: a second base plate (121); a third channel (123); first and second electrodes (131, 132) disposed in the third channel (123); a fourth channel (124); third and fourth electrodes (133, 134) disposed in the fourth channel (124); a pressure chamber (129) disposed between the third and fourth channels (123, 124); and a second film (122). The first chip (110) and the second chip (120) are superimposed on each other so that the partition wall (116) and the pressure chamber (129) face each other.