Abstract: A transmission includes a rotating shaft, a sleeve configured to rotate around an axial center of the rotating shaft, a fork engaged with an external circumference of the sleeve, and a shift shaft disposed parallel to the rotating shaft and supporting the fork. The fork includes a support part supported by the shift shaft, a first arm part extending from the support part in a circumferential direction of the rotating shaft and disposed above the sleeve, and an oil receiving part disposed on the first arm part. The oil receiving part has an elongated hole that extends in a direction perpendicular to an axial direction of the rotating shaft as seen in a top view.