Fluid handling unit and fluid handling apparatus using same

A fluid handling unit comprising:

• an container body having an opening at an upper end thereof, a bottom portion at a lower end thereof, and a side portion which extends from a peripheral portion of an upper face of the bottom portion, said container body defining therein a fluid housing section by the bottom portion and the side portion;
• a partition wall portion which extends from the bottom portion of the container body and which extends along the side portion of the container body, said partition wall portion dividing the fluid housing section of the container body into an inside fluid housing chamber and an outside fluid housing chamber which surrounds the inside fluid housing chamber;
• and
• at least one communication passage which passes through the partition wall portion to establish a communication between the inside fluid housing chamber and the outside fluid housing chamber,
• wherein a distance between the side portion of the container body and the partition wall portion varies in circumferential directions for changing a capillary force, which is exerted on a liquid housed in the outside fluid housing chamber, in the circumferential directions which extend along the peripheral portion of the upper face of the bottom portion of the container body.