Abstract: An improved structure foldable bicycle that provides for the folding of the major sections of a bicycle, easy portability and storage, safety and stability, time and energy savings, and additional practicality which is comprised of upper and lower plates as well as a cam lever between the top tube and head tube of the front frame that enables folding and securing, with a quick-release stem clamp between the top tube and the handlebar providing for handlebar extension and retraction. An insert box and an insert block as well as a coupler box and an coupler block are respectively disposed between the upper and lower extents between the front frame and the rear frame that provide for folding and securing. A quick-release clamp installed between the seatpost and the seatpost tube at the lower extent of the saddle provides for extension, retraction, and tightening into position. A side stand installed at the lower extent of the rear frame provides for the vertical posturing of the folded frame.