This book contains information about the traditional used and phytochemicals of belalai gajah (Clinacanthus nutans). This report had scientifically supported the testimonies of Malaysian who claimed that C. nutans possesses antitumour effects and has saved many cancer patients. The uses of plant in traditional medicine and current studies had beendiscussed. Single compounds had been isolated by purification using chromatographic techniques. Apart from that, a brief review of concept between chemical composition and biological activities is also described in this book