PROBLEM TO BE SOLVED: To provide a chemical diffuser container having an inserted bag having a heat sealing strength easy to adjust, and the insertion bag has a heat sealed portion breakable at a specific region.SOLUTION: The chemical diffuser container 1 includes an outside container 2 made of a resin and the inserted bag 3 stored in the outside container 2. The inserted bag 3 has a storing portion 8 filled with a liquid or gelled chemical 4. The inserted bag 3 has an upper sealed portion 10 formed with a large number of seal eliminated portions 30 having a triangular shape and positioned along the longitudinal direction of the upper sealed portion 10. Adjacent seal eliminated portions 30 have a top portion 30a of a triangle directed to the inside of the inserted bag 3, and a bottom portion 30b of a triangle directed to the inside of the inserted bag 3 which are alternately adjacently disposed.
