<p>Disclosed is a novel derivative having remarkable curative effects on malignant tumors, for which a natural triterpene compound serves as a lead compound. Specifically disclosed is an agent for treatment of malignant tumors, which contains a faradiol derivative represented by the general formula (1) below or a salt thereof. (In the formula, R1 and R2 may be the same or different and each represents a linear or branched chain alkylene group having 2-8 carbon atoms.)</p>
