Power tool

A power tool which brakes a motor without turning off a trigger switch when a trouble occurs in the motor is provided. The power tool ( 10) comprises: a motor (20) that rotates by supply of electricity from a power source (PS); a controller (38) for controlling the rotation of the motor; a switch (12) for switching on and off of power supply from the power source to the motor manually; first braking means (23) for braking the motor when the switch (12) is switched from on to off; and second braking means (23， 45) for braking the motor (20) on the basis of a prescribed signal from the controller when the switch (12) is in an on state.