<p>A brushless motor comprises a circuit protecting case (10); a holder disposed on the case; a motor shaft (2) rotatably held by the holder; a stator (5) disposed about the holder and including a plurality of coils which surround the motor shaft; a yoke (7) fixed to the motor shaft to rotate therewith and covering the stator with a given space therebetween; permanent magnets (6) held by the yoke; a circuit substrate (14) tightly held in the circuit protecting case (10); a drive circuit arranged on the circuit substrate, the drive circuit including a switching section (30) which switches the path of current directed to the coils (5c) of the stator and a control section (40) which controls a switching timing of the switching section, the switching section including a plurality of switching elements (31) which generate a certain heat when operated. A partition wall (80) is provided in the circuit protection case to partition the interior of the case into a first chamber (10a) to which the switching elements (31) of the switching section (30) are exposed and a second chamber (10b) to which the control section (40) is exposed. <IMAGE></p>
