PROBLEM TO BE SOLVED: To obtain a chemical diffuser that is compact and has high chemical diffusing performance.SOLUTION: Air is sent to a chemical holder 11 by a first air blower 31 and a second air blower 32. An inlet port 22 of the first air blower 31 and an inlet port 23 of the air blower 32 are arranged so as to overlap an outlet port 12b of a frame part 12 as viewed in an air flow direction, and arranged side by side at an interval.