An adjustable doorway threshold that has at least one side which is moveable to change its height to compensate for differing adjacent floor heights. In one embodiment of the invention the doorway threshold includes an elongated central member having a raised horizontal longitudinal surface and a longitudinal edge. A ramp member, approximately the same length as the central member, is disposed with its inner edge adjacent to the longitudinal edge of the central member. The ramp member has an outer edge disposed at a lower horizontal elevation than the raised longitudinal horizontal surface of the central member. The ramp member is hingeably attached at its inner edge to the longitudinal edge of the central member such that the outer edge of the ramp member is moveable vertically with respect to the central member. The threshold ramp member is disposed over the top of the flooring material and not adjacent to the edge of the floor material. A spring may be disposed underneath the ramp member to push the ramp downward onto the flooring material beneath.