A device for creating a chromatogram on the basis of the time variation of a spectrum acquired within a wavelength range that includes a target wavelength, said device being provided with a data storage means (131) for storing spectrum data for each retention time; a pre-correction chromatogram display means (132) for creating and displaying, on the basis of data acquired from the data storage means (131), a pre-correction chromatogram (311) that is a chromatogram for the target wavelength; a time specification means (133) for enabling a user to specify, from within a pre-correction chromatogram (311) peak, an arbitrary specified time different from a peak-top retention time; a spectrum display means (134) for displaying, on the basis of data acquired from the data storage means (131), a peak-top spectrum (321) that is the spectrum for the peak-top retention time of the pre-correction chromatogram and a specified-time spectrum (322) that is the spectrum for the specified time; a wavelength specification means (135) for enabling a user to specify, from within the wavelength range, a specified wavelength that is different from the target wavelength; and a post-correction chromatogram display means (136) for displaying a post-correction chromatogram (332) in which a sensitivity coefficient (K), which is obtained by dividing the intensity (Ia) of the specified-time spectrum (322) at the target wavelength by the intensity (Ib) of the specified-time spectrum (322) at the specified wavelength, is multiplied by the chromatogram for the specified wavelength and for changing the display to that of a post-correction chromatogram (332) corresponding to a changed specified time and/or specified wavelength when the specified time and/or specified wavelength is changed.