Abstract: In a displacement measuring instrument comprising a case having a substantially enclosed construction, a fixed scale solidly secured to the case, a spindle abutted at the forward end thereof against an object under measurement and reciprocated due to a displacement of the object under measurement and a movable scale operationally associated with the spindle, and capable of measuring the displacement of the object under measurement from a variation in physical value between the movable scale and the fixed scale due to the displacement of the object under measurement, a vane wheel is provided which is rotatable by the utilization of the reciprocatory motion of the spindle or the movable scale, so that a moving resistance increasing with the increase in the rate of travel can be given against the movement of the spindle or the movable scale.