Abstract: The present invention relates to lumber positioning or feeding systems to be used in saw mills, planing mills and the like in order to laterally displace lumber as it is being simultaneously advanced in the forward direction. In particular, the present invention is concerned with a lumber positioner apparatus for advancing lumber, which positioner comprises a vertically displaceable angling mechanism which may be selectively activated to cause lumber to be simultaneously displaced in a lateral direction, resulting in a vectorized movement of the lumber in order that the position of the lumber may be quickly and accurately controlled for further processing, such as cutting or trimming.