The invention discloses a laser output head and a laser, and relates to the technical field of lasers. The laser output head includes an outer shell, an inner shell, a lens fixing piece, an optical fiber fixing piece, a tail end fixing piece and an optical component. The inner shell is arranged in the outer shell, the lens fixing piece is assembled with the outer shell and/or the inner shell, andthe optical component is arranged in the inner shell and the lens fixing piece; the optical fiber fixing piece and the tail end fixing piece are assembled in the outer shell and used for fastening theoptical component and the inner shell; a cooling channel is formed between the inner shell and the outer shell; the outer shell is formed with a first port and a second port communicating with a cooling channel. The laser output head in the embodiment of the invention effectively eliminates the influence of the return light and the forward residual pump light.