Abstract: An elevator belt includes elongate load carrying members and a jacket with a straight line of recesses parallel to an extension direction of the belt at a center of the jacket. The recesses extend at least to a depth between two neighboring members and can be slits throughout the jacket. The recesses have lateral flanks arranged at an angle of more than 60° to an extension plane of the belt. A sheave has a main body with a cylindrical traction surface and a sprocket arranged coaxial with and at a center of the traction surface with respect to a longitudinal extension of the traction surface. Teeth of the sprocket extend outwardly beyond the traction surface. A bearing connects the sprocket rotatably to the main body. The teeth engage and cooperate with the recesses or slits to prevent any lateral slippage or jumping of the belt on the traction surface.