From the methanolic extracts of the soft coral Lobophytum compactum, three lobane diterpenes were isolated by combination of various chromatographic techniques. By ESI-mass. H-NMR. 13C-NMR (CPO and DEPT). HSQC and HMBC spectra, they were structurally elucidated to be lobatriene (1), lobatrienolide (2), and lobatrientriol (3). This is the first report of these compounds from L. compactum.