To provide a hand held machine tool reducing the number of additional constituent members, a space, and assembly cost.

At a position of a shut-off member 32 where locking bodies 18, 20 are released in the radial direction, the locking bodies 18, 20 can shift in the direction of prescribed constituent members 42, 44 toward an outer side in the radial direction, and the constituent members act on the locking bodies 18, 20 toward an inner side in the radial direction based on a spring moving the locking bodies 18, 20.