INTERNAL COMBUSTION ENGINE

An internal combustion engine 1 includes a fuel injection valve 6 that injects fuel to a combustion chamber in which a swirl flow is generated. For example, injection holes 611A and 611B are two adjacent injection holes among plural injection holes 611, and are two injection holes injecting the fuel to a region E1 and a region E2. The region E1 and the region E2 configure regions, of the combustion chamber E, in which angular velocities of the swirl flow are respectively low and high are located in this order in a direction R in injecting the fuel. An interval F1 between the injection holes 611A and 611B are smaller than a reference interval Fs.