Provided is a volatile composition having a small difference in volatilization amounts of a volatile substance within a wide temperature range from the normal temperature and enabling the control of the volatilization amount even at a high temperature by suppressing the volatilization amount of the volatile substance and by increasing the gel strength of the volatile composition. Specifically provided is a volatile composition comprising an alkyl cellulose having such a viscosity that a viscosity at 20℃ of a 1% by weight aqueous solution of the alkyl cellulose is 4,000 to 11,000 mPa．s as determined by a Brookfield viscometer and having such a storage elastic modulus that a storage elastic modulus G'(65℃) at 65℃ of a 1.5% by weight aqueous solution of the alkyl cellulose is 3,000 to 4,500； a volatile substance； and a solvent.本發明係提供一種揮發性組成物，其係藉由抑制揮發性物質之揮發量，並提高揮發性組成物之凝膠的強度，而於廣泛的溫度範圍中與常溫時之揮發性物質的揮發量之差為少，且即使高溫時亦可控制揮發量。具體而言係提供一種揮發性組成物，其係至少包含：於20℃時之1質量%水溶液之以B型黏度計所得的黏度為4,000~11,000mPa‧s，且於65℃時之1.5質量%水溶液的儲存模數G’(65℃)為3,000~4,500Pa之烷基纖維素、揮發性物質、以及溶劑。
