A folding type bicycle comprising: a front frame provided with a front wheel and a handle; a center frame provided with pedals and a saddle; a rear frame provided with a rear wheel; and a hinge device to enable the front frame, the center frame and the rear frame to pivot about one another, to be foldable with respect to one another, the hinge device comprising a front hinge member provided at the front frame, a center hinge member provided at the center frame, and a rear hinge member provided at the rear frame; a hinge shaft centrally provided at the hinge device; and a front rim provided at the front hinge member, a center rim provided at the center hinge member and a rear rim provided at the rear hinge member, characterized in that the hinge device further comprises a plurality of rolling members to enable rolling-contact among the front, center and rear rims (431, 421), wherein either a) each of the front and rear rims comprises rim guides each having an arc shape, and rim protrusions extending from opposite ends of each of the rim guides, respectively, each of the rolling members comprising a cylinder fitted in a fitting hole formed at the center frame, and rollers respectively fitted around opposite ends of the cylinder, to rotatably contact corresponding ones of the rim guides of the front and rear rims, or b) the center rim comprises rim guides each having an arc shape, and rim protrusions extending from opposite ends of each of the rim guides, respectively; and each of the rolling members comprises a cylinder fitted in a fitting hole formed at a corresponding one of the front and rear frames (100, 300), and a roller fitted around an end of the cylinder, to rotatably contact a corresponding one of the rim guides of the center rim. a front frame provided with a front wheel and a handle; a center frame provided with pedals and a saddle; a rear frame provided with a rear wheel; and a hinge device to enable the front frame, the center frame and the rear frame to pivot about one another, to be foldable with respect to one another, the hinge device comprising a front hinge member provided at the front frame, a center hinge member provided at the center frame, and a rear hinge member provided at the rear frame; a hinge shaft centrally provided at the hinge device; and a front rim provided at the front hinge member, a center rim provided at the center hinge member and a rear rim provided at the rear hinge member, characterized in that the hinge device further comprises a plurality of rolling members to enable rolling-contact among the front, center and rear rims (431, 421), wherein either a) each of the front and rear rims comprises rim guides each having an arc shape, and rim protrusions extending from opposite ends of each of the rim guides, respectively, each of the rolling members comprising a cylinder fitted in a fitting hole formed at the center frame, and rollers respectively fitted around opposite ends of the cylinder, to rotatably contact corresponding ones of the rim guides of the front and rear rims, or b) the center rim comprises rim guides each having an arc shape, and rim protrusions extending from opposite ends of each of the rim guides, respectively; and each of the rolling members comprises a cylinder fitted in a fitting hole formed at a corresponding one of the front and rear frames (100, 300), and a roller fitted around an end of the cylinder, to rotatably contact a corresponding one of the rim guides of the center rim. a) each of the front and rear rims comprises rim guides each having an arc shape, and rim protrusions extending from opposite ends of each of the rim guides, respectively, each of the rolling members comprising a cylinder fitted in a fitting hole formed at the center frame, and rollers respectively fitted around opposite ends of the cylinder, to rotatably contact corresponding ones of the rim guides of the front and rear rims, or b) the center rim comprises rim guides each having an arc shape, and rim protrusions extending from opposite ends of each of the rim guides, respectively; and each of the rolling members comprises a cylinder fitted in a fitting hole formed at a corresponding one of the front and rear frames (100, 300), and a roller fitted around an end of the cylinder, to rotatably contact a corresponding one of the rim guides of the center rim.