PROBLEM TO BE SOLVED: To provide a volatilization body capable of slowly volatilizing an impregnated medicine while securing a medicine impregnation amount.SOLUTION: When a volatilization body 1 in an unused state is used, the cut part 54 of a bag 12 is cut with scissors. In this way, opening parts 60, 60 of opening one edge side and the other edge side in the bag 12 are formed, the outer circumferential face 41 of a holding body 11 is surrounded by a surrounding part 43, and on the other hand, a usage state 62 where the edge faces 61, 61 of the holding body 11 are exposed is made formable.