Connecting rod and internal combustion engine

An internal combustion engine that has an adjustable compression ratio, at least one cylinder and a crankshaft on which at least one connecting rod engages, the connecting rod having a crankpin bearing eye for attachment to the crankshaft, a connecting-rod bearing eye attachment of said connecting rod to a piston of the cylinder, and an eccentric adjustment device for adjusting an effective connecting rod length, the eccentric adjustment device having an eccentric that interacts with an eccentric lever, each eccentric rod having a piston guided in a hydraulic chamber of the connecting rod, the hydraulic chambers in which the pistons are guided being charged with hydraulic oil from first hydraulic lines that are integrated into the crankshaft and that lead to the crankpin bearing eye and second hydraulic oil lines that lead away from the crankpin bearing eye, check valves preventing a backflow of the hydraulic oil from the hydraulic chambers back into the second hydraulic lines, and at least one filter element disposed preventing an ingress of contaminants into the hydraulic chambers from the crankshaft via the hydraulic oil.