A new monoterpene, platydiol (1), and three new diterpenes, platyclolactonic acid (2), 14, 15-bisnor-8(17)-labdene-16, 19-dioic acid (3), and 6, 7-dehydrosandaracopimaric acid (4), were isolated from the pericarp of Platycladus orientalis. Their structures were elucidated by spectral and chemical methods.