To provide a valve for hot line branching joint work capable of saving labor for welding and conducting branching joint work with a simple method.

This valve for hot line branching joint work is provided with a joint part 10 for welding and fixing at both sides of a valve box 2 and a circular groove part 31 along a peripheral direction at an outer peripheral of one of the joint parts 10. A divided ring 32 plurally divided is fastened with a fixing bolt 33 to be attached to the circular groove part 31. A connecting flange ring 34 for airtightly connecting a drill side flange 38 of a drill is airtightly located on a beveled part 35 at a tip of the joint part 10. The connecting flange ring 34 is continuously fixed on the divided ring 32 with a continuous bolt 36.