Provided is a stress-induced light-emission material, obtained through a step in which a phosphoric acid compound and europium-activated strontium aluminate particles are mixed to prepare a slurry, a pulverization step in which the slurry is pulverized to produce a pulverized slurry, and a drying step in which the pulverized slurry is dried. The stress-induced light-emission material is characterized in that, using the elemental strontium content (A) of the stress-induced light-emission material obtained and the elemental strontium content (B) after the stress-induced light-emission material is held for 168 hours in an atmosphere with a temperature of 85°C and a relative humidity of 85%, the ratio of change, calculated by (A-B)/A×100, is 10% or less.
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