Plasma torch

[Problem] To provide a plasma torch capable of effectively cooling a nozzle through to an injection hole for a plasma arc and having stable electrical conduction performance. [Solution] A plasma torch has a nozzle (A) and a torch body (B). The nozzle has an inner nozzle (2) and an inner cap (3) fastened to the torch body together with the inner nozzle, an annular passage (8) and a plurality of independent water channels (9) being formed therebetween, and is configured so that, when the inner cap is fastened to a nozzle base (14), a fastening force is conveyed via a bulkhead (2f). The torch body has a supply port (20) and an exhaust port (21), one of which is configured from a groove connected to the water channels and extended in-plane in a direction crossing the axis. When the nozzle is fastened to the torch body, one of the independent water channels communicates with the supply port and another of the independent water channels communicates with the exhaust port, and a rear end face (2h) of the inner nozzl