1. An analytical tool, comprising:a first unit including an analysis portion for analyzing a sample, and a connecting portion having a projection: and
a second unit configured to be coupled with the first unit, and including a liquid reservoir for confining a particular liquid used for analyzing the sample and configured to be connected to the connecting portion,
wherein the second unit includes a sealing member that seals the liquid reservoir, and wherein the tool is configured such that, when the second unit is connected to the connecting portion, the projection breaks the sealing member, and the fluid passage is formed,
wherein the tool is configured such that a fluid passage for conducting the particular liquid from the liquid reservoir into the first unit is formed in the analytical tool when the first unit and the second unit are coupled.