Folding bicycle

A folding type bicycle is disclosed. The disclosed folding type bicycle includes a front frame (100) provided with a front wheel (10) and a handle (20), a center frame (200) provided with pedals (30) and a saddle (40), a rear frame (300) provided with a rear wheel (50), a hinge device (400) to enable the front frame (100), the center frame (200) and the rear frame (300) to pivot about one another, to be foldable with respect to one another, the hinge device (400) comprising a front hinge member (410) provided at the front frame (100), a center hinge member (430) provided at the center frame (200), and a rear hinge member (420) provided at the rear frame (300), a hinge shaft centrally (440) provided at the hinge device (400), a front rim provided at the front hinge member (410), a center rim (431) provided at the center hinge member (430) and a rear rim (421) provided at the rear hinge member (420), and rolling members (480) to enable rolling-contact among the front, center and rear rims.