An internal combustion engine that includes at least one cylinder with at least one piston reciprocating in a cylinder liner; a piston cooling device to cool the piston, and which includes at least one spraying tube with a spray nozzle which is directed towards a bottom side of the piston facing a crankcase, the at least one spraying tube being fixed to the cylinder liner; and a connecting channel arrangement to fluidically connect the spraying tube to an oil supply channel arranged in a cylinder block, the connecting channel arrangement including at least one connecting channel formed at least partly in the cylinder liner, and at least one curved connecting channel. In order to ensure reliable piston cooling, the connecting channel arrangement includes at least one curved connecting channel.