PROBLEM TO BE SOLVED: To provide a medicament volatilization device in which careless spill of a liquid medicament that is accommodated in an upper surface opening shape container body can be suppressed.SOLUTION: A medicament volatilization device 1 includes: an upper surface opening shape container body 11 a liquid medicament 2 that is accommodated in the container body 11 and a volatilization body 12 that is immersed in the liquid medicament 2. A peripheral wall 32 of the container body 11 is made a shape that is widen to an outside according to going from a bottom surface 31 to an upper side. A basilar part of the container body 11 is disposed by a projection part 51 that projects toward an upper side, and the projection part 51 is composed by an arc shape projection 52. The arc shape projection 52 makes an arc shape that encloses a center 53 of the bottom surface 31, and respective arc shape projections 52 are disposed to enclose the center 53. A clearance 54 is formed between the respective arc shape projections 52, and the respective arc shape projections 52 are disposed at a corner part 61 of the bottom surface 31 and the peripheral wall 32.
