[en] The position sensitive proportional counter (PSPC) is capable of providing accurate positional informations with high resolving power and high count rate capability. If the PSPC system is applied in the field of X-ray stress measurements, the following features can be anticipated; (1) No goniometer is necessary. (2) Stress analysis can be accomplished at a high speed unequaled by any conventional method in use today. In the present paper, the application of PSPC for stress measurement is reported A new type PSPC having 85 mm long of effective length was made, in which the position sensitivity is achieved by measuring the electric charge of output pulses from a proportional counter having a high resistance cathode. A spatial resolution of 230 μm was obtained over the full length of the detecter. Stress measurement was performed on several bending type specimens of carbon steel. The difference in stress measured by this system between load on and load off was in close agreement with that measured by the wire strain gage method. The time required for the stress analysis was reduced to 1/5 -- 1/10 of that with the conventional counter method. (auth.)