[PROBLEMS] To provide a volatilizer which can suppress a reduction in volatilization effect of a volatile agent. [MEANS FOR SOLVING PROBLEMS] A container for a volatile agent, comprising a cylindrical case (3) having an opening on at least one of both ends in its axial direction. A gelled volatile agent is housed in the case (3). The container is used in such a state that the axial direction of the case (3) is substantially horizontal. The container further includes a cylindrical member (20) disposed within the case (3) and supported by the case (3). In the cylindrical member (20), a planar part (20a) extended in a substantially horizontal direction is provided at least on the upper part of the case (3).
