During the period from 1981 to 1986, Campylobacter and Salmonella were isolated from healthy dogs and cats by the Nagano Prefecture Dog Pound Office. Campylobacter was isolated from 35 (7.0%) dogs out of 497 and 14 (10.1%) cats out of 138. Salmonella was isolated from 38 (7.6%) dogs out of 497, but not isolated from cats. The frequency of the isolation of Salmonella in puppies (under one year old) was about 2 times higher than that of adult dogs. A total of 42 strains of Salmonella was isolated from the dogs, and it was typed into 15 serovars. S. infantis, S. agona, S. anatum and S. paratyphi B, d- tartrate(+) were the most frequent serovars. Isolated Campylobacter strains were identified as C. jejuni (48 strains) and C. colt (1 strain). Considering these results, we were suggested that dogs and cats may act as possible sources of Campylobacter and Salmonella infection in human.