A large number of creep rupture tests on OFHC copper wire have been carried out at stress levels of 24.0∼25.0 Kg/mm 2 and temperatures of 8∼40°C. The F-test was made for the differences in variance between time for initiation of accelerating creep and time for rupture measured from the initiation of accelerating creep, and the regression analysis between these times was carried out. The scatter observed for these times appears to be an inherent characteristic of the material itself associated with a Markoff process–dynamic statistical process– as a rate process.