An indole compound of the following Formula, or a pharmaceutically acceptable salt or stereoisomer thereof: in which m denotes a number of 1 to 3; n denotes a number of 0 to 2; R1 represents hydrogen, C 1 -C 6 -alkyl, -(CH 2) n -C 3 -C 6 -cycloalkyl or -(CH 2) n -heterocyclyl, wherein heterocyclyl is a 4- to 8-membered ring having 1 to 3 heteroatoms selected from N, O and S; R2 represents C 1 -C 6 -alkyl or -(CH 2) n -A-R6, wherein A represents C 4 -C 8 -cycloalkyl, or represents 4- to 8-membered heterocyclyl or heteroaryl each of which has 1 to 3 heteroatoms selected from N, O and S, or represents 6- to 10-membered aryl, R6 represents hydrogen, C 1 -C 6 -alkyl, halogen, hydroxy, nitrile, nitro, -C -R7 or -SO 2 R7, and R7 represents C 1 -C 6 -alkyl or allyl, or represents 6- to 10-membered aryl, or represents 4- to 8-membered heterocyclyl or heteroaryl each of which has 1 to 3 heteroatoms selected from N and S, and is optionally substituted with oxo; R3 represents hydrogen, halogen, hydroxy, -O-R7, -NH-R7 or -(CH 2) n -R7; R4 represents hydrogen or XR8R9, wherein X represents CH or N, R8 and R9 independently of one another represent hydrogen or Z-R10, Z represents -(CH 2) n -, - C -, -C (CH 2) n - or -(CH 2) n C -, R10 represents hydrogen, amino, C 3 -C 6 -cycloalkyl or - r C(=NH)NH 2, or represents 4- to 8-membered heteroaryl or heterocyclyl each of which has 1 to 3 heteroatoms selected from N, O and S, and r denotes a number of 0 or 1; R5 represents hydroxy or 6- to 10-membered aryl, or represents -(CH 2) n -4- to 9-membered heterocyclyl which has 1 to 4 heteroatoms selected from N, O and S, and optionally contains oxo; and where alkyl, alkoxy, aryl, cycloalkyl, heterocycle and heteroaryl may be optionally substituted, and the substituents are one or more selected from the group consisting of hydroxy, halogen, nitrile, amino, C 1 -C 6 -alkylamino, di(C 1 -C 6 -alkyl)amino, carboxy, C 1 -C 6 -alkyl, halogeno-C 1 -C 6 -alkyl, C 1 -C 6 -alkoxy, aryl-C 1 -C 6 -alkoxy and oxo. m denotes a number of 1 to 3; n denotes a number of 0 to 2; R1 represents hydrogen, C 1 -C 6 -alkyl, -(CH 2) n -C 3 -C 6 -cycloalkyl or -(CH 2) n -heterocyclyl, wherein heterocyclyl is a 4- to 8-membered ring having 1 to 3 heteroatoms selected from N, O and S; R2 represents C 1 -C 6 -alkyl or -(CH 2) n -A-R6, wherein A represents C 4 -C 8 -cycloalkyl, or represents 4- to 8-membered heterocyclyl or heteroaryl each of which has 1 to 3 heteroatoms selected from N, O and S, or represents 6- to 10-membered aryl, R6 represents hydrogen, C 1 -C 6 -alkyl, halogen, hydroxy, nitrile, nitro, -C -R7 or -SO 2 R7, and R7 represents C 1 -C 6 -alkyl or allyl, or represents 6- to 10-membered aryl, or represents 4- to 8-membered heterocyclyl or heteroaryl each of which has 1 to 3 heteroatoms selected from N and S, and is optionally substituted with oxo; R3 represents hydrogen, halogen, hydroxy, -O-R7, -NH-R7 or -(CH 2) n -R7; R4 represents hydrogen or XR8R9, wherein X represents CH or N, R8 and R9 independently of one another represent hydrogen or Z-R10, Z represents -(CH 2) n -, - C -, -C (CH 2) n - or -(CH 2) n C -, R10 represents hydrogen, amino, C 3 -C 6 -cycloalkyl or - r C(=NH)NH 2, or represents 4- to 8-membered heteroaryl or heterocyclyl each of which has 1 to 3 heteroatoms selected from N, O and S, and r denotes a number of 0 or 1; R5 represents hydroxy or 6- to 10-membered aryl, or represents -(CH 2) n -4- to 9-membered heterocyclyl which has 1 to 4 heteroatoms selected from N, O and S, and optionally contains oxo; and where alkyl, alkoxy, aryl, cycloalkyl, heterocycle and heteroaryl may be optionally substituted, and the substituents are one or more selected from the group consisting of hydroxy, halogen, nitrile, amino, C 1 -C 6 -alkylamino, di(C 1 -C 6 -alkyl)amino, carboxy, C 1 -C 6 -alkyl, halogeno-C 1 -C 6 -alkyl, C 1 -C 6 -alkoxy, aryl-C 1 -C 6 -alkoxy and oxo.