PROBLEM TO BE SOLVED: To provide an organ fibrosis inhibitor capable of effectively inhibiting (preventing) organ fibrosis such as renal fibrosis.SOLUTION: There is provided a compound represented by, e.g., the general formula (I). [R1 is an unsubstituted or C1-7 alkyl group-substituted benzene ring or the like R2 is a substituent at position 4, 5, 6 and/or 7 of indole and selected from H, a C1-4 alkyl group and the like and R3 is a group selected from OH and the like.]
