Abstract: The present invention relates to a flag holding device for engaging the shaft of a flag or banner to a vehicle window. A preferred embodiment of the device comprises a mounting base, a support clip, and a substantially cylindrical shaft. The mounting base includes a socket and a locking mechanism. The support clip includes an interior arm and an exterior arm which engage the vehicle window and serves a shock absorption function while maintaining the shaft in a substantially upright position. The support clip arms ares preferably rectangular in cross-section, with a ratio of arm thickness to arm width of 1 to 6. A second embodiment includes a mounting base having two sockets for receiving two shafts, the orientation of the two sockets causing the two shafts to engage one another to help prevent accidental removal. A third embodiment includes a mounting base having multiple sockets which enable the mounting base to receive a shaft in a variety of orientations.