(1) A method to obtain a scale of subjective time unbiased by the time‐order error is suggested. (2) The method gives as by‐product some preliminary results on the memory process which gives rise to the time‐order error. (3) The method is applied in an experimental study. Two methods, the adjustment method and the reproduction method were used to construct a subjective time scale within the range 1–7 seconds. The former method gave an almost linear R‐S curve while the latter resulted in a positively accelerated curve. (4) The time‐order error seems to be a very rapid process. The memory curve reaches very near its asymptotic value within a few tenths