Plants belonging to the genus Albizia (Fabaceae) are traditionally subject of medicinal uses in many countries. Their various properties (larvicidal, antimicrobial, antiparasitic, cytotoxic, effects on nervous system, etc.) were thoroughly investigated. In Madagascar, Albizia is represented by 27 species of which 25 are endemic and two were introduced from other countries. Actually, neither chemical nor pharmacological study on the Malagasy species is reported in the literature. We assessed the antimicrobial activity of extracts from five endemic species of Albizia. Results showed that the extracts from A(3) and A(5) showed activity against all the tested germs at various degrees.