Analysis Chip Device

An analysis chip device used in sample analysis, the analysis chip device comprising:

• a first unit including a sample introduction section through which a sample is introduced, and an analysis section at which analysis of the sample is performed;
• and
• a second unit including a storage reservoir in which a specific liquid is enclosed, wherein:
• the first unit includes a first coupling portion and the second unit includes a second coupling portion,
• the first unit and the second unit are integrated by the first coupling portion and the second coupling portion being connected, thereby forming a channel for the specific liquid to flow from the storage reservoir to the analysis section,
• the first coupling portion and the second coupling portion are a combination of a protrusion and a recess having shapes that fit together with each other,
• one of the protrusion or the recess is formed from a material of higher pliability and elasticity than a material of another of the protrusion of the recess, and
• a cross-section of at least a part of the protrusion, along an orthogonal direction to a direction in which the protrusion is fitted into the recess, is larger than a cross-section of a cavity of the recess, along the orthogonal direction at a location where the part of the protrusion makes contact when the protrusion is fitted in the recess, such that the protrusion or the recess deforms when the protrusion and the recess are fitted together, thereby preventing leakage of the specific liquid from a coupled location between the first coupling portion and the second coupling portion.