PURPOSE: A supporting device for a bicycle is provided to stably part a bicycle by supporting a supporter to the ground to be exposed to outside and to reduce a collision area. CONSTITUTION: A supporting device(1) for a bicycle comprises a receiving groove(4) and a supporter(6). The receiving groove is formed in the bottom of a frame(3) which fixes a rear wheel and a pedal shaft of a bicycle(2). The supporter is fixed to one end of the receiving groove and is embedded in the receiving groove. The bottom of the supporter is exposed to outside. A hanging protrusion(7) is formed in the supporter in order to support the bottom surface of the frame and is exposed to the outside of the receiving groove.
