Ignition device and internal combustion engine

An ignition device configured to ignite a fuel included in an air-fuel mixture supplied to a main combustion chamber of an internal combustion engine, the ignition device comprising:

• a partition member having a front inner surface and a circumferential surface which are provided to form a precombustion chamber that encloses an ignition point of a fuel, the partition member including a plurality of first communicating holes in the circumferential surface to communicate between the main combustion chamber and the precombustion chamber;
• and
• a first interference member that protrudes inward from the front inner surface of the partition member,
• wherein the first interference member is crossed by a central axis of each of the plurality of first communicating holes in a plane including a central axis of the ignition device,
• wherein the partition member further includes a plurality of second communicating holes in the front inner surface to communicate between the main combustion chamber and the precombustion chamber, each of the plurality of second communicating holes having a central axis not crossing the first interference member, and
• wherein at least one of the central axes of the plurality of first communicating holes does not intersect any of the central axes of the plurality of second communicating holes.