This analytical device is characterized in that a peeling portion (14) that spreads outward is partially connected to the outer peripheral rim of a reagent holding portion (13) that is formed in a separation chamber (6) provided within a body case (2) and holds a reagent (8). According to this configuration, when a droplet of the reagent (8) is subjected to drying treatment and affixed to the reagent holding portion (13), external force acting on the droplet can be made smaller than in the other portions, shrinkage based on drying is started from the position of the peeling portion (14), and in the state in which drying has ended, the planar shape of the reagent (8) can be made smaller than the reagent holding portion (13), and also the thickness of the reagent (8) can be made larger than in the prior art.