INTERNAL COMBUSTION ENGINE

It is to provide an internal combustion engine capable of achieving reduction in size of a cylinder head and enhancing the degree of freedom in layout of components to be attached to a coolant outlet. [0002] [Solution] [0003] An engine 1 includes: a cylinder head cover 5 attached to an upper portion of a cylinder head 4; and an EGR device 11 to reflux, as an EGR gas, a part of an exhaust gas discharged from an exhaust collection portion (4b) toward an intake port (4a). The EGR device 11 includes: an upstream-side EGR piping 12; an EGR cooler 13; an EGR valve 14; a downstream-side EGR piping 15; and an EGR passage portion 26. The EGR passage portion 26 is provided in the cylinder head cover 5.