PROBLEM TO BE SOLVED: To provide a volatilization container improvable in the degree of design freedom while preventing faults.SOLUTION: The volatilization container includes a gel agent storage part 11 of container shape for storing a gel agent 2, and a support part 41 of container shape for supporting the gel agent storage part 11 in a state of its opening 31 facing downward. The peripheral surface 52 of the support part 41 is formed in such hemispherical shape as to incline inward toward the bottom face 51, and volatilization openings 71 are opened in the peripheral surface 52. The volatilization openings 71 are arranged so that the lower ends of the volatilization openings 71 are located on the lower side of the opening 31 of the gel agent storage part 11 in a state of the gel agent storage part 11 being set to the support part 41. Ribs 81 abutting on the gel agent 2 when the gel agent 2 swells from the opening 31 of the gel agent storage part 11 are erected on the bottom face 51 of the support part 41, and each rib 81 is extended toward the center of the support part 41 from the peripheral surface 52 side of the support part 41.
