A head-up display for a motorcycle, which is adapted to inform a driver of traffic information by display of an image projected on a screen provided in front of a riding position of a driver, wherein when a visual field for a driver who takes a riding posture and turns his or her eyes to the front side is divided into a central field and a peripheral field surrounding said central field, said image is located in said peripheral field on said screen, and wherein said image is a stripe or linear pattern extending in a horizontal direction, wherein a width of said image in said horizontal direction is determined so that an angle formed between two lines extending from a point in said central field to both ends of said image becomes at least 20°.