This paper records the digenetic trematodes of fishes collected from Jiaozhou Bay. 21 species of trematodes were found from 529 specimen belonging to 49 species of fishes. Among them 4 species are considered as new to science. A list of the trematodes from Jiaozhou Bay is given. The descriptions of the new species are as follows. All measurements are in millimeters, ova in microns. The type specimens are deposited in the Institute of Oceanology, Academia Sinica.