Abstract: There is disclosed a removable vent window for a roof of an automobile which is particularly adapted for retrofit installation. The vent window is mounted in an opening extending across a major width of a car roof, preferably slightly rearwardly of the forward edge of the roof. The opening is framed with members of preformed or stretch formed extruded aluminum which are stretch formed into a generally rectangular frame to provide support for the hinges and latches that secure the vent window. The vent window is removably mounted in the opening by hinge members along the forward edge of the opening. The rear edge of the opening and window bear detachable latching mechanisms whereby the window can be pivoted between a closed, sealing position and an open, forwardly inclined, venting position. The latch mechanisms can be detached from the window, freeing the rear edge of the window and permitting it to be pivoted to an elevated position and disengaged from its hinges for complete removal of the window.