A spray gun structure comprises a control valve mounted into an assembling chamber of a body and regulated by an adjusting device to control the on/off of water discharge thereby. A coupling sleeve is joined to the body with an abutment surface of a water-sealing sleeve abutting tight against a water-sealing area of the control valve, and protruding tracks engaged with guide recesses of a water-guiding element. A spray head having a connecting sleeve and a restrain collar mounted thereto is fitted to the body and screw-joined to the water-sealing element. The connecting sleeve is mounted to abut against the coupling sleeve, and the restrain collar has restrain blocks to restrict protrusions of the body. Therefore, when the spray head is pivotally rotated to and forth in its place, the water-guiding element can be synchronically actuated to move linearly forwards or backwards to verify the pattern of water spray thereby.