From December 1985 to May 1986, 288 samples (including chicken feather, chicken meat, chicken gizzard, chicken intestine, washing water, scalding water, chopping board smear and chicken feed) collected from the traditional markets in Norhern Taiwan, were tested for the con-tamination of Campylobacter jejuni. The result was as follows: 4 in 38 chicken gizzard samples, 1 in 38 chicken meat samples, 1 in 36 chopping board smear samples, and 1 in 27 feed samples were detected to be contaminated with C. jejuni, with a total 2.4% detection rate.