In this study, the parasites of Pyllotreta atra (Coleoptera: Chrysomelidae) in Trabzon were investigated. Samples of P. atra were collected in different localities of Trabzon. Three different types of parasites from P. atra observed are as follows: Gre-garine (Apicomplexa), Nematode (Tylenchida: Allantonematidae) and larvae of certain parasitoids. The most abundant infection found in this study was gregarine infection followed by nematode infection with total infection rates 37.8% and 7.6%, respectively. The gre-garine and the nematode parasites were identified as Gregarina phyllotretae and Howardula phyllotretae, respectively.