Abstract: A ball slideway which is employed, for example, for slidably supporting a work table on the bed of a machine tool, and which is suitable for use with large loads and easy to manufacture. A ball slides are provided with two ball circulating paths, each holding therein a number of balls. A ball slide is disposed on either side of an elongated rectangular guide member between the guide member and the inner sides of a bracket which surrounds three sides of the guide member. The balls make angular contact with both sides of the guide member and the adjacent inner sides of the bracket.