FLOW PATH STRUCTURE AND DEVICE FOR MEASURING MEASUREMENT OBJECT LIQUID

As a flow channel structure that facilitates to reduce a size of a measuring device in which the flow channel structure is embedded, there is provided a flow channel structure that includes a substrate including a supply flow channel that guides a measurement target liquid toward inside; a separation element accommodating unit that accommodates a separation element that separates a plurality of components included in the measurement target liquid, the measurement target liquid being guided by the supply flow channel; and a detector that guides the measurement target liquid that passes through the separation element accommodating unit, wherein measuring light for measuring information about the plurality of components is to be irradiated onto the measurement target liquid, wherein the detector includes a measurement flow channel part that guides the measurement target liquid, an incident part that is provided at an end of the measurement flow channel part and that guides the measuring light toward inside the measurement flow channel part, and an emission part that is provided at the other end of the measurement flow channel part and that guides the measuring light from the measurement flow channel part.