A roof rail includes a support member configured to be assembled on a roof of a vehicle, a first cover made from synthetic resin material, the first cover including a lengthwise-direction first end portion which is fixed to the support member and a lengthwise-direction second end portion which is supported by the support member to be expandable and contractible in a vehicle front/rear direction, and a second cover made from synthetic resin material, the second cover being supported by the support member to be expandable and contractible in the vehicle front/rear direction, the second cover including a lengthwise-direction end portion which is assembled to the lengthwise-direction second end portion of the first cover, wherein an outer surface of the lengthwise-direction second end portion of the first cover and an outer surface of the lengthwise-direction end portion of the second cover are coplanar with each other.