A numerical controller capable of performing axis reconfiguration of control axes in at least two paths without need for the paths to wait. A program block is read and it is determined whether or not the read block includes an axis detachment command. If the block includes the axis detachment command block, an action axis attribute of an control axis designated by the axis detachment command is altered to a non-action axis attribute. Further, if the read block includes an axis allocation command, it is determined whether or not an control axis designated by the axis allocation command becomes a non-action axis, and when the control axis has the non-action axis attribute, the non-action axis attribute of the control axis is altered to a designated path's action axis attribute. Thus, the axis reconfiguration processing in one path can be performed separately from axis reconfiguration processing in another path.