A vehicle roof retracting device comprises a guiding mechanism, a rear shelf, a principal shaft, an adjusting lever, an initiative lever, and a connecting lever. The guiding mechanism of the roof rotates around the principal shaft for actuating the roof to displace between a closed position and a retracted position. The rear shelf provides a space for the passage of the roof when it is opened and conceals a gap between the roof and the trunk cover when it is closed. The adjusting lever is connected to an extension extending transversely from one end of the guiding mechanism and actuated by the extension to rotate around the principal shaft. A protruding part of the adjusting lever is engaged with or disengaged from the initiative lever for rotating the initiative lever around said principal shaft. The connecting lever is configured to connect the initiative lever and the rear shelf for displacing the rear shelf between the open position and the closed position.