Nozzle and spray gun

The invention relates to the technical field of jetting apparatuses, especially to a nozzle and a spray gun. The nozzle comprises a nozzle body, a guiding connection rod passing through and arranged in the through hole, a spring and an anti-blocking end cap, wherein the nozzle body is provided with a through hole perforated along a spraying direction and at least one transmission hole, one end of the guiding connection rod is provided with a spring seat, the spring is sleeved on the guiding connection rod and located between the spring seat and the tail end of the nozzle body, and the anti-blocking end cap is fixedly connected with the other end of the guiding connection rod and located at the outer side of the jet tip of the nozzle body. When the nozzle provided by the invention does not spray materials, the anti-blocking end cap compresses the nozzle under the action of the elastic force of the spring, so external materials are effectively prevented from blocking the nozzle, and thus, the nozzle has a wider application scope and working reliability of the spray gun is improved.