[PROBLEMS] To provide a volatilizer, which can prevent a reduction in volatilization effect of a volatile agent, and a container for a volatile agent. [MEANS FOR SOLVING PROBLEMS] A volatilizer (1) comprising a gelled volatile agent (5) including a hole part (51) having an opening on its surface, wherein a tubular member (6) is disposed within the volatile agent (5) so that the inner circumferential surface (6a) surrounds the hole part (51).