This study was to select Bacillus bacteria that have the ability to control Fusarium solani and Curvularia lunata and have the ability to promote plant growth. Bacteria were separated by 16 isolates from the soil around rice roots (Rhizosphere soil) and 3 isolates from inside the rice roots (Endophyte). The hostility towards the fungi Curvularia lunata and Fusarium was studied. solani by the Dual culture method, found that there was only 1 isolate, isolate RS2-4, with the percentage of inhibiting the growth of C.lunata and F.solani, which were 54.65 and 54.12, respectively, and testing for the creation of Volatile components. In inhibiting fungal growth, it was found that isolate RS2-4 was able to create Volatile components to inhibit C.lunata and F.solani with values of 65.88% and 28.24%, respectively. In addition, the production of chitinase enzyme was studied. The isolates RS 2-4 were tested for chitinase enzyme production. Found to be able to produce chitin-digesting enzymes. It has an enzymatic index value of 4.5 and from studies of bacteria that promote plant growth, it was found that isolate RS2-4 can fix nitrogen, dissolve potassium, produce IAA, dissolve zinc carbonate and dissolve zinc oxide. can It can also digest large molecules including pectin, fat, protein and starch. Morphological data The physiology and biochemistry studied were able to classify RS2-4 isolates as bacteria in the genus Bacillus. There is insufficient information to classify the species. From the results of this experiment, it can be concluded that isolate RS2-4 is a bacterium of the genus Bacillus. It has the properties of an antagonist and a bacterium that promotes plant growth. If RS2-4 isolate is applied in agriculture Can be used in conjunction with fertilizing with phosphate because RS2-4 isolate only lacks phosphate solubility. Therefore, if used, it should be used in conjunction with fertilizer that has phosphate fortification.