A power tool , which is adapted to perform a prescribed operation on a workpiece by driving a tool accessory , comprising a motor , a tool accessory driving shaft that is arranged in parallel to a rotation axis of the motor and is driven by the motor to drive the tool accessory , a body housing that houses at least part of the tool accessory driving shaft and the motor , a tool accessory holding member that can move between a clamp position to clamp the tool accessory between the tool accessory holding member and the tool accessory driving shaft in order to hold the tool accessory and a release position to release the clamping of the tool accessory in order to remove the tool accessory , a holding mechanism for holding the tool accessory holding member in the clamp position, and a transmitting member that is connected to the tool accessory driving shaft and transmits rotation of the motor to the tool accessory driving shaft , wherein the holding mechanism includes an engagement member that can engage with the tool accessory holding member in the clamp position, and a biasing member that biases the engagement member so as to provide the engagement member with a force of holding the tool accessory holding member in the clamp position, the engagement member is disposed within the body housing , the tool accessory is held on one end region of the tool accessory driving shaft , and the transmitting member is connected to the tool accessory driving shaft between the ends of the tool accessory driving shaft , characterized in that the engagement member is disposed on the other end region of the tool accessory driving shaft in an axial direction of the tool accessory driving shaft . a motor , a tool accessory driving shaft that is arranged in parallel to a rotation axis of the motor and is driven by the motor to drive the tool accessory , a body housing that houses at least part of the tool accessory driving shaft and the motor , a tool accessory holding member that can move between a clamp position to clamp the tool accessory between the tool accessory holding member and the tool accessory driving shaft in order to hold the tool accessory and a release position to release the clamping of the tool accessory in order to remove the tool accessory , a holding mechanism for holding the tool accessory holding member in the clamp position, and a transmitting member that is connected to the tool accessory driving shaft and transmits rotation of the motor to the tool accessory driving shaft , wherein the holding mechanism includes an engagement member that can engage with the tool accessory holding member in the clamp position, and a biasing member that biases the engagement member so as to provide the engagement member with a force of holding the tool accessory holding member in the clamp position, the engagement member is disposed within the body housing , the tool accessory is held on one end region of the tool accessory driving shaft , and the transmitting member is connected to the tool accessory driving shaft between the ends of the tool accessory driving shaft , characterized in that the engagement member is disposed on the other end region of the tool accessory driving shaft in an axial direction of the tool accessory driving shaft . <EOS>