Excoecaria agallocha is a mangrove plant used in traditional medicines for curing a wide variety of diseases. Research on the effect of the extracts on different organisms has yielded varying results. It was understood from literature studies that the extracts have wonderful healing effects and are used against many human disease conditions. Also, it was found to be effective in controlling a variety of plant pathogenic microorganisms. In the present study, an attempt was made to test the antifungal effects of Excoecaria agallocha L. by the inhibition of spore formation in Fusarium oxysporum, Helminthosporium oryzae, Alternaria tennuis and budding in Yeast (Saccharomyces cerevisiae). It was proved that the extract was capable of bringing about the desired antifungal effect in a concentration dependent manner.