An engine lubrication structure supplies oil from an oil pump to individual components of an engine in which a balancer shaft is disposed parallel with a crank shaft in a crank case, the engine includes a turbocharger which compresses intake air using exhaust gas of the engine; a main gallery which supplies oil to a bearing of the crank shaft and a bearing of the balancer shaft and a sub-gallery which supplies, to individual components of the engine, oil that has been supplied to the bearing of the balancer shaft are provided in the crank case; and an oil passage which supplies oil to the turbocharger is connected to the sub-gallery.

An aspect of the invention is directed to a lubricating structure of an internal combustion engine for feeding oil from an oil pump to respective portions of the internal combustion engine where a balancer shaft is disposed in parallel with a crankshaft in a crankcase, wherein: a main gallery and an oil passage are provided in the crankcase so that oil can be delivered from the oil pump to the main gallery and the oil of the main gallery can be guided by the oil passage to pass through a bearing of the balancer shaft; and the oil passage feeds the oil that has passed through the bearing of the balancer shaft to a cylinder head.

A lubricating structure of an internal combustion engine that feeds oil to a driveshaft of a transmission disposed in parallel with a crankshaft and a balancer shaft in a crankcase, wherein the balancer shaft is disposed below the crankshaft and the driveshaft is disposed at rear of the crankshaft, and a main gallery, a first oil passage, a second oil passage and a third oil passage are formed in the crankcase as defined herein, and a lubricating structure of an internal combustion engine that feeds oil to a bearing of a balancer shaft disposed in parallel with a crankshaft in a crankcase, wherein a main gallery, a first oil passage, and a second oil passage are formed in the crankcase as defined herein.