The present invention relates to a spray gun (spray gun) for a spray gun, and more particularly, the nozzle unit 100, the valve unit 200, and the handle unit 300 are sequentially connected, and the valve unit 200 has an inner cylinder 220. The inlet passage 410 and the outlet passage 420 are communicated with each other through the valve, and the valve hole moves in a straight line with the outlet passage 420 in the cylinder 220 by the operation of the lever. It relates to a spray gun for a nebulizer having a structure to open and close the 170. The valve 230 extends from the inside of the cylinder 220 to the external operation lever 250 in a straight line with the outflow passage 420, and a conical needle valve is formed at the tip of the valve 230. At the rear end, a bolt-shaped screw having a predetermined length is formed to fasten the clearance adjusting nut 232 to adjust the operation interval of the operation lever 250, and the protruding cam 252 formed on one inner surface of the operation lever 250. It characterized by the structure to be able to move the valve 230 in a straight line. The present invention provides a spray gun in which the nozzle portion, the valve portion, and the handle portion 300 are formed in a straight shape, so that the operator can work in a comfortable state by lowering the arm down during the operation, even when the arm or wrist is in a long time operation. It is possible to reduce the fatigue, and by installing a clearance control device to adjust the distance between the operating lever 250 and the handle according to the operator's conditions to prevent the fingers from being uncomfortable even during repeated work or long time work. In addition, it is easy to simply disassemble and assemble not only the nozzle part, the valve part, the handle part, but also the valve and the packing inside, so that it is easy to wash after use, and also easy to replace the packing, filter 320 The cylindrical shape is formed inside the handle
