The present invention irradiates a determination object made of resin with light, receives reflected light from the determination object irradiated with the light, and calculates an absorption spectrum of the determination object based on the reflected light. Calculated from the absorption spectrum, a wavelength band of 1.42 μm to 1.44 μm, a wavelength band of 1.45 μm to 1.47 μm, a wavelength band of 1.66 μm to 1.68 μm, 1.72 μm to 1 Wavelength band of .74 μm or less, wavelength band of 1.92 μm or more and 1.94 μm or less, wavelength band of 2.11 μm or more and 2.12 μm or less, wavelength band of 2.17 μm or more and 2.20 μm or less, 2.31 μm or more and 2.34 μm Provided is a brominated flame retardant determination method for determining whether or not a brominated flame retardant is contained in the determination target based on an absorption spectrum in at least one of the following wavelength bands.
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