Power tool

A power tool includes a housing， a saw blade for cutting a workpiece， a motor for driving the saw blade to rotate about a first axis， a circuit board for controlling the motor， a heat sink for cooling， and a base plate being formed with a flat surface for contacting with the workpiece during cutting. The housing includes a first containing portion being formed with a first container for containing the motor， a second containing portion extended along a direction substantially parallel to the flat surface from one of the two ends of the first containing portion along a direction substantially perpendicular to the first axis. The second containing portion is formed with a second container which is communicated with the first container. The circuit board and the heat sink are disposed in the second container.