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A new filovirus named Měnglà virus was found in bats in southern China in 2015. This species has been assigned to the new genus <i>Dianlovirus</i> and has only been detected in China. In this article, we report the detection of filoviruses in bats captured in Vietnam. We studied 248 bats of 15 species caught in the provinces of Lai Chau and Son La in northern Vietnam and in the province of Dong Thap in the southern part of the country. Filovirus RNA was found in four <i>Rousettus leschenaultii</i> and one <i>Rousettus amplexicaudatus</i> from Lai Chau Province. Phylogenetic analysis of the polymerase gene fragment showed that three positive samples belong to <i>Dianlovirus</i>, and two samples form a separate clade closer to <i>Orthomarburgvirus</i>. An enzyme-linked immunosorbent assay showed that 9% of <i>Rousettus</i>, 13% of <i>Eonycteris</i>, and 10% of <i>Cynopterus</i> bats had antibodies to the glycoprotein of marburgviruses.