The present invention provides a pole shaft device including an outer shaft (10); an inner shaft (20) which is disposed in the outer shaft (10) and slides along the inside of the outer shaft (10); a fixing member (30) which is fixed on the inner shaft (20) and has an inclined surface formed in the circumferential direction thereof; and an extension member (40) which is coupled to the outer shaft (10) so as to be movable in the longitudinal direction thereof, and is extended by friction with the inclined surface so as to fix the outer shaft (10) and the inner shaft (20).

A walking cane is provided having a foot, a handle, a pole member having a hollow interior cavity or shaft connecting said foot with said handle, an adjustable spring contained within said hollow shaft, and a tension adjusting mechanism operatively associated with said adjustable spring constructed and arranged to adjust spring tension imparted when downward force is applied from said handle, through said shaft and terminating at said foot.