This torque transmission mechanism (A) for an internal combustion engine is adapted to transmit a starting torque from a starter motor to a crankshaft (4) of the internal combustion engine and comprises a ring gear (2) that transmits the starting torque and a one-way clutch (8) disposed between the ring gear (2) and the crankshaft (4). Rotation of the ring gear (2) with respect to the crankshaft (4) is allowed by a sliding contact between at least two surfaces (60, 820, 62, 122).