Abstract: A sunvisor for a vehicle has a support shaft inserted into a visor body and a retention device. The support shaft rotatably supports the visor body around the support shaft. The retention device inhibits the visor body from slipping-off from the support shaft. The retention device has one or more engaging members that are pivotably mounted in the visor body. The one or more engaging members have an engaging portion. When the visor body moves in the direction of slipping-off of the support shaft, at least one of the engaging members is pressed by the support and is pivoted. The engaging portion then engages with a locking portion formed at the support shaft.