A wood planing machine includes a base, a cutter carriage, a motor housing mounted on the cutter carriage and having a vent port, a motor disposed in the motor housing, a rotary cutter mounted on the cutter carriage, a shaft extending from the rotary cutter and driven by the motor, a blower mounted on the cutter carriage and having a fan driven by the shaft, a sawdust-guiding member mounted on the cutter carriage and having a box and a rear spout extending from the box to the rotary cutter to define a sawdust passageway, an air duct in fluid communication with the vent port of the motor housing and the box, a first conduit in fluid communication with the blower housing and the box, a second conduit in fluid communication with the blower housing, and a sawdust collector in fluid communication with the second conduit.