Abstract: An engine balancer driving arrangement is disclosed having a plurality of sprockets or belt pulleys mounted, respectively, on a driving shaft of an oil pump or the like, on the crankshaft, and on the shafts of said balancers and a single endless timing chain or corrugated belt engaged with all of said sprockets or belt pulleys. The two sprockets or belt pulleys, which are mounted on the balancer shafts, are brought into engagement with the inner and outer periphery of said timing chain, respectively. The oil pump or other auxiliary mechanism is disposed within a dead space which is formed by the cam shaft driving mechanism between the front wall of the engine and said balancer driving mechanism thereby reducing the overall length of the engine.