ENGINE AND STRADDLED VEHICLE INCLUDING SAME

A power unit 6 includes an engine 6A. The engine 6A has a crankshaft 61. Further, the engine 6A has a crankcase 62 accommodating the crankshaft 61. A dynamic damper 200 is provided in the crankcase 62. The dynamic damper 200 includes a damper mass 210 and a support member. The support member 220 includes an elastic object and supports the damper mass 210 at the crankcase 61. During an operation of the engine 6A, bending vibration is generated in the crankshaft 61. At this time, the damper mass 210 vibrates on one straight line that is orthogonal to a center axis of the crankshaft 61 and parallel to a direction of bending vibration generated in the crankshaft 61.