A fuel injection valve (21) is provided with a plurality of injection holes (25) arranged at intervals in a lateral direction, when a direction in which a central axis (CL) of the cylinder (2) extends is a vertical direction, so that the plurality of injection holes (25) are directed radially. The plurality of injection holes (25) are configured such that, when an angle formed between two adjacent injection axes, among a plurality of injection axes (Axf) defining the respective injection directions of the injection holes, is an included angle, the included angle (θ1) formed by two injection axes closest to the central axis of the cylinder (2) is the smallest of all the included angles (θ1, θ2, θ3).