Abstract: The present invention addresses the problem of providing a fluid handling device configured so that fluid can be efficiently received into a receiving section without loss. Provided is a fluid handling device having: a receiving section including a side surface and a bottom surface and receiving fluid; an introduction flow passage having an opening in the side surface of the receiving section and allowing fluid to flow toward the receiving section; a fluid guide section disposed within the receiving section so as to be connected to the opening of the introduction flow passage and causing fluid, which flows from the introduction flow passage, to flow toward the bottom surface of the receiving section; and a suction flow passage having an opening in the side surface of the receiving section and sucking in air present within the receiving section.