With a light source evaluation device 10 according to the present invention and a solar cell evaluation device 1 employing the same, a dependency P (λ, Ib) for each wavelength λ of a short-circuit current Ib generated by white bias light of a measurement target solar cell 2, which is pre-measured at each of a plurality (i) of irradiance levels, is regarded as a spectral responsivity Pi (λ) at each irradiance level, and a value for adjusting a light quantity of an illumination light source 3 that illuminates the solar cell 2 is computed using a spectral responsivity Ps (λ), which is computed using the spectral responsivity Pi (λ), a pre-supplied spectral irradiance S (λ) of reference sunlight, and a pre-measured spectral irradiance L (λ) of the illumination light source 3. Therefore the light source evaluation device 10 having this configuration and the solar cell evaluation device 1 employing the same can accurately adjust the light quantity of the illumination light source 3 when evaluating the solar cell 2 of which spectral responsivity changes depending on the light quantity.