Abstract: A portable timber milling apparatus comprising a wheeled, mobile platform with a power generator set located on one end thereof. The platform carries a longitudinally extending beam supported adjacent each end for transverse movement by transverse beam support members which are engaged with posts located on each side of the platform. The posts carry elevating means for vertical movement of the members and the beam. A carriage mounted on wheels for movement along the beam, the carriage having vertical and horizontal saw blades each driven by separate electric motors. A further electric drive motor is provided to move the carriage along the beam. A plurality of log traversing chains are mounted on the platform and are operable to move a log thereof to a position centrally of the platform and aligned with the beam.