It is an object of the invention to increase the degree of freedom in designing a power tool. A representative power tool has a spindle that transmits a driving force of a motor to a tool accessory, a tool accessory holding member that is configured to be movable in a direction of a spindle rotation axis direction between a holding position for holding the tool accessory and a releasing position for releasing the tool accessory, a lock mechanism that locks the tool accessory holding member in the holding position, and a body housing. The lock mechanism is disposed between a second end of the spindle and a wall of the body housing in the spindle rotation axis direction.