A leather belt has a buckle body and a belt body. The buckle body has a bottom base and a positioning segment. The bottom base has a through slot and a limiting groove. The through slot and the limiting groove are transversally formed through the bottom base and communicate with each other. The positioning segment is formed on and protrudes from the bottom base, and has a positioning rod. The belt body is connected to the buckle body and has a connecting end, a passing end, a first positioning hole, and multiple second positioning holes. The connecting end is connected to the positioning rod and is mounted in the limiting groove. The passing end is mounted in the through slot. The first positioning hole is formed through the belt body and is disposed around the positioning rod. The second positioning holes are formed through the belt body at intervals.