A door glass guiding structure is provided which can be constituted by using a glass guide member made from a low-priced material such as rolled sheet, and is capable of satisfactorily maintaining required functions.The door glass guiding structure 3 comprises the glass guide member 10 which is disposed between two door glasses supported side by side on a door for example, the side door 2) of the vehicle so as to guide the vertical movement of at least one of the door glasses, the core bracket 21 which is constituted of a member different from the glass guide member 10 and is mounted on top end of the glass guide member 10 so as to extend the length thereof upward, and the guide upper end seal member 13 attached to cover the external surface of the core bracket 21 so as to provide water-tight sealing on the top ends of the two door glasses.