Thickness planer

A thickness planer configured to plane a workpiece by a driving force of a motor, the thickness planer comprising:

• a housing;
• a controller having a control board configured to control driving of the motor;
• a cutting head configured to plane the workpiece;
• at least one intake port in the housing;
• at least one outlet port in the housing;
• an air flow passage that is in the housing and configured such that air taken into the housing from the at least one intake port flows through the air flow passage to the at least one outlet port via the motor;
• and
• a fan that is configured to generate flow of air from the at least one intake port to the at least one outlet port through the air flow passage, wherein:
• the motor is housed in the housing;
• a region of the controller is on the air flow passage;
• the air flow passage has a branch part for branching the air flow passage into a plurality of branch flow passages, on a downstream side of the motor in an air flowing direction;
• and
• when a portion of the air flow passage on an upstream side of the branch part is defined as a main air flow passage, and the plurality of branch flow passages on a downstream side of the branch part include a first branch air flow passage and a second branch air flow passage;
• the first branch air flow passage is configured to communicate with the at least one outlet port;
• the second branch air flow passage is configured to circulate a part of the air flowing through the main air flow passage;
• and
• the region of the controller is on the second branch air flow passage.