[Technical Problem] It is an object to provide a surface plasmon-field enhanced fluorescence spectroscopic measurement method and a surface plasmon-field enhanced fluorescence spectroscopic measurement apparatus that are capable of measuring a fluorescence signal in a precise manner regardless of a type of a light detection means by adjusting a dynamic range of an SPFS apparatus even in the case in which a concentration of an analyte is high. [Solution of Problem] For a surface plasmon-field enhanced fluorescence stereoscopic measurement method wherein an analyte that has been labeled with a fluorescence substance is excited by surface plasmon light that has been generated by applying an excitation light to a metallic thin film and the generated fluorescence is received by a light detection means to thereby detect the analyte, a dynamic range is expanded by adjusting a light amount of the fluorescence that is received by the light detection means.
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