Fluid handling device and fluid handling system

A fluid handling device, comprising:

• a channel chip including:
• a well for containing a fluid,
• a channel connected to the well,
• a valve disposed on the channel, and
• a through hole which has an opening located on a front surface of the fluid handling device and an opening located on a rear surface of the fluid handling device;
• and
• a pressing member including a first protrusion and a second protrusion, the first protrusion being for pressing the valve to close the valve, the second protrusion being inserted into the through hole and being for positioning the first protrusion with respect to the valve, the pressing member being rotatable about a rotational axis extending through the second protrusion,
• wherein the first protrusion is disposed to move along a circle centered on the rotational axis extending through the second protrusion, when the pressing member rotates about the rotational axis.