During the investigation of parasites of indigenous fishes from different water bodies of Mymensingh, four helminth parasites belonging to Monogenea, Digenea and Cestoda were recovered. The mono geneans-Ancylodiscoides mystusi and Ancylodiscoides aori from Mystus aor, the digenetic trematode- Bucephalopsis karvei from Xenentodon cancila and the cestode- Proteocephalus sp. were collected from Mystus aor. The worms were studied morphologically and systematically for their identification. Though these monogenetic.and digenetic trematodes were reported earliar in other country from the host mentioned, recorded from the first time from Bangladesh waters, indicating their host specificity beyond the geographical area. Record of Proteocephalus sp. is also the first report frc ii Bangladesh water.