It is an object to provide a test instrument and an optical measurement apparatus which enable easy matching of test results when tests by optical measurement are performed with respect to a large number of patients.To the above end, a test instrument B is provided, which includes reagent retaining portions 8A, 8B, 8C retaining a reagent which reacts with a sample to produce a color reaction. The test instrument B includes a patient information entry section 64 as an example of patient identifying information region in which patient identifying information is to be written.