A spectroscopic measurement apparatus comprising: an integrator including an internal space in which a measurement object is disposed, a light input portion for inputting light from outside to the internal space, and a light output portion for outputting light from the internal space to the outside; a first spectroscopic detector configured to disperse light of a first wavelength region in the light output from the light output portion and acquire first spectrum data for a first exposure time T S1; a second spectroscopic detector configured to disperse light of a second wavelength region partially overlapping with the first wavelength region in the light output from the light output portion and acquire second spectrum data for a second exposure time T S2; and an analysis unit configured to analyze the first spectrum data and the second spectrum data on the basis of the first exposure time T S1 and the second exposure time T S2, wherein the second wavelength region is on a long-wavelength side compared to the first wavelength region, and the second exposure time T S2 is longer than the first exposure time T S1; wherein the analysis unit is further configured to store a correction value calculated based on a ratio between a number of photons I C1 obtained with a reference light in a common wavelength region in the first spectrum data for an exposure time T C1 and a number of photons I C2 obtained with said reference light in the common wavelength region in the second spectrum data for an exposure time T C2; wherein the analysis unit is further configured to correct at least one of the first spectrum data and the second spectrum data on the basis of the correction value, the first exposure time T S1 and the second exposure time T S2, the exposure times T C1 and T C2, Lime, and to obtain a spectrum in an entire wavelength region including both the first wavelength region and the second wavelength region; and wherein the common wavelength region is a wavelength region in which the first wavelength region and the second wavelength region overlap. an integrator including an internal space in which a measurement object is disposed, a light input portion for inputting light from outside to the internal space, and a light output portion for outputting light from the internal space to the outside; a first spectroscopic detector configured to disperse light of a first wavelength region in the light output from the light output portion and acquire first spectrum data for a first exposure time T S1; a second spectroscopic detector configured to disperse light of a second wavelength region partially overlapping with the first wavelength region in the light output from the light output portion and acquire second spectrum data for a second exposure time T S2; and an analysis unit configured to analyze the first spectrum data and the second spectrum data on the basis of the first exposure time T S1 and the second exposure time T S2, wherein the second wavelength region is on a long-wavelength side compared to the first wavelength region, and the second exposure time T S2 is longer than the first exposure time T S1; wherein the analysis unit is further configured to store a correction value calculated based on a ratio between a number of photons I C1 obtained with a reference light in a common wavelength region in the first spectrum data for an exposure time T C1 and a number of photons I C2 obtained with said reference light in the common wavelength region in the second spectrum data for an exposure time T C2; wherein the analysis unit is further configured to correct at least one of the first spectrum data and the second spectrum data on the basis of the correction value, the first exposure time T S1 and the second exposure time T S2, the exposure times T C1 and T C2, Lime, and to obtain a spectrum in an entire wavelength region including both the first wavelength region and the second wavelength region; and wherein the common wavelength region is a wavelength region in which the first wavelength region and the second wavelength region overlap.