A roof bar (10) for a motor vehicle (1) is disclosed in which an elongate load carrying member (213) and a single elongate stay (214) are hingedly connected to a roof (5) of the motor vehicle (1) by a pair of base plates (211). The elongate load carrying member (213) is selectively held in a deployed position by a latch mechanism (222, 255) which latches a castellated edge of the elongate load carrying member (213) to a castellated edge of the single elongate stay (214) along a significant portion of the interface between the two components (213, 214) so as to provide a strong support for any loads carried by the roof bar (10). The components (211, 213, 214) forming the roof bar (10) are all relatively thin and the elongate load carrying member (213) and the single elongate stay (214) are arranged to fold flat on the roof (5) of the motor vehicle (1) so as to minimise any change in vehicle height when the roof bar (10) is stowed.