Abstract: A portable power tool comprising a support tube connected to an engine by means of an intervening clutch casing, a slider tube slidably fitted to the support tube and spring-biased forward relative to the support tube, a connecting rod connected to a front end of the slider tube and pivotally supporting a cutter holder, a rotary cutter rotatably supported by the holder, a flexible shaft for transmitting a drive force of the engine to the cutter for rotation, a lever mounted on a rear portion of the slider tube, and a wire extending rearward from the lever for connection to the clutch casing, whereby when the lever is pivoted to slide the slider tube relative to the support tube, the holder is pivotally moved to change the orientation of the cutter.