The study was conducted to collect and identify endo-parasites of fresh water fishes from water bodies of Sina Kolegoan Dam in Dist. Osmanabad (M.S) and to determine the prevalence and intensity of infestation brought about by the endoparasites in the hosts. The host fishes were collected from fresh water Sina Kolegoan Dam. The prevalence of endo-parasites in the fresh water fisheswas 30.38%. The intensities of infestation was2.6. Five parasite species were found from Masacembelusarmatus and channagachua fishes. The parasite groups were Cestodes (Senga sp., Circumoncobothrium sp.),trematodes(Azygia sp.)nematodes (Procamallanussp.) werefound in the fishes collected from Sina Kolegoan Dam. Liver, Air bladder, stomach, intestine and body cavity of the host fishes wereexamined for parasites.The intensity and the prevalence were higher inhost fishes collected from Sina Kolegoan Dam host fishes.