Atomization device and culture device

An atomization device comprising:

• a main body part including a storage space configured to store hydrogen peroxide solution;
• a diaphragm including a jetting part configured to atomize hydrogen peroxide solution that passes through a through hole, the through hole being formed in the jetting part of the diaphragm and a part through which the hydrogen peroxide solution stored in the storage space passes, the diaphragm including an outer surface facing a side opposite to a storage space side, the diaphragm being disposed on a front side of the main body part such that the outer surface faces an obliquely upper side with respect to a horizontal surface;
• and
• a holding member including an inner cylindrical part and a contact part configured to make contact with the main body part,
• wherein the inner cylindrical part located between the storage space and the diaphragm and including a supply path connected to the storage space, the supply path being a part through which hydrogen peroxide solution flowing from the storage space toward the diaphragm passes,
• wherein an upper end line connecting an uppermost end of an inner peripheral surface of the inner cylindrical part at each position from an end portion on a diaphragm side to an end portion on a storage space side has a shape whose height increases as a distance to the storage space decreases,
• wherein the jetting part has a dome shape protruding to the front side of the main body,
• wherein the main body part includes a bottom surface to which the contact part makes contact, and
• wherein a liquid-stopping protrusion is formed in one of the contact part and the bottom surface, the liquid-stopping protrusion protruding toward the other of the contact part and the bottom surface and configured to make contact with the other of the contact part and the bottom surface.