A paint gun, which minimizes time loss occurring during color change, essentially comprising - at least one gun body, - at least one trigger which is provided on the gun body and on which pressure is applied in order to spray the paint, - at least one nozzle from which the paint comes upon the trigger is pushed, - at least one air valve assembly which is mounted on the gun body, - at least one air valve which is located in the air valve assembly, - at least one elbow which is located in the air valve assembly, - at least one paint valve assembly which is mounted on lower part of gun body, - at least one paint valve which is located on the paint valve assembly, - at least one air hose which provides the air connection between the paint valve and the elbow, - at least one main circuit air hose inlet which is located at the lower end of the gun body and enables the entrance of air, - at least one paint hose which is connected to the upper end of the paint valve, - at least one fast connection paint inlet and at least one fast connection paint discharge which are connected to the paint valve assembly, - at least one fast connection elbow which connects the ends of the air hose enabling the connection of the paint valve assembly and the air valve assembly on the gun body, and characterized by - air valve assembly which comprises at least one air valve, at least one elbow to which the air hose one end of which is connected to the fast connection elbow is connected, at least one triggering button which is triggered to pump air, at least one reduction member and at least one fixing member which enable to fix the air valve assembly to the gun body, at least one needle and at least one check valve, - fast connection paint inlet which is attached to the place where the cleaning chemical (solvent, etc) is present during color change, which is mounted to the paint valve assembly at the lower end of the gun body and which is attached to the color of the paint to be charged for the new color after the color in the gun body is discharged, - air valve which comes to the open position upon the triggering button in the air valve assembly is pushed together with the trigger for color change, and triggers the paint valve. - at least one gun body, - at least one trigger which is provided on the gun body and on which pressure is applied in order to spray the paint, - at least one nozzle from which the paint comes upon the trigger is pushed, - at least one air valve assembly which is mounted on the gun body, - at least one air valve which is located in the air valve assembly, - at least one elbow which is located in the air valve assembly, - at least one paint valve assembly which is mounted on lower part of gun body, - at least one paint valve which is located on the paint valve assembly, - at least one air hose which provides the air connection between the paint valve and the elbow, - at least one main circuit air hose inlet which is located at the lower end of the gun body and enables the entrance of air, - at least one paint hose which is connected to the upper end of the paint valve, - at least one fast connection paint inlet and at least one fast connection paint discharge which are connected to the paint valve assembly, - at least one fast connection elbow which connects the ends of the air hose enabling the connection of the paint valve assembly and the air valve assembly on the gun body, and characterized by - air valve assembly which comprises at least one air valve, at least one elbow to which the air hose one end of which is connected to the fast connection elbow is connected, at least one triggering button which is triggered to pump air, at least one reduction member and at least one fixing member which enable to fix the air valve assembly to the gun body, at least one needle and at least one check valve, - fast connection paint inlet which is attached to the place where the cleaning chemical (solvent, etc) is present during color change, which is mounted to the paint valve assembly at the lower end of the gun body and which is attached to the color of the paint to be charged for the new color after the color in the gun body is discharged, - air valve which comes to the open position upon the triggering button in the air valve assembly is pushed together with the trigger for color change, and triggers the paint valve.