An electric foldable and portable four-wheeled vehicle having a handlebar equipped with brake and accelerator control levers, a saddle, a receptacle to hold small objects and an electric accumulators supporting tray, wherein its load-bearing structure comprises a lower perimeter frame and an upper perimeter frame linked by means of at least two first bars and two second bars; said frames and said first and second bars (1, 2) being made of metal or special fibres such as carbon fibres; said lower perimeter frame being formed by section bars connected to each other; said upper perimeter frame being formed by at least a first side bar and a second side bar; each side bar (11, 12) of the upper perimeter frame is equipped with at least one rail; the longitudinal axis of each rail being parallel to the longitudinal median axis of the side bar (11, 12); said first bars being located in the front part of the four-wheeled vehicle and said second bars being located in the rear part; the lower ends of the first front bars being pivoted onto the side bars (3, 4) of the lower perimeter frame by means of pins (13; the upper ends of the first front bars being pivoted onto the side bars (11, 12) of the upper perimeter frame by means of pins; a plate being fastened to each side of the lower perimeter frame; a semi-circular slit (15.1) being placed in the peripheral area of each plate, each semi-circular slit (15.1) having an enlarged upper end (15.2) and an enlarged lower end (15.3); the lower ends of the second rear bars being pivoted onto said plates by means of pins; the upper ends of said second rear bars being pivoted onto said side bars (11, 12) of the upper perimeter frame by means of locking pins; each locking pin being housed in a hole made in a block; each block having at least a recess or guide engaging with one rail of a side bar (11, 12) of the upper perimeter frame; a second pin being secured to the middle-upper part of each second rear bar and a third pin being secured to the middle-lower part of each second rear bar; said third pin of each second rear bar being free to slide in the slit (15.1) of each plate and being housed in one of its enlarged ends (15.2, 15.3); each third pin being equipped with a lever fixed to an eccentric locking each second rear bar to the plate; two third side bars linking the side bars (3, 4) of the lower perimeter frame to the second rear bars; the front end of each third side bar being pivoted onto the front end of the lower perimeter frame; each third side bar having a slit (33.1) extending along the longitudinal median axis of the side bar itself; each third side bar being pivoted onto each second rear bar by means of said second pin located in the middle-upper part of each second rear bar itself; each second pin of the second rear bar being housed in said slit (33.1) of a third side bar; an axle being connected to the front part of the lower perimeter frame; two hubs being fastened to the two ends of the axle itself and two front wheels being mounted onto said hubs; a joint connecting the two hubs of the front wheels to the axle of the handlebar by means of tension rods is fastened to the lower perimeter frame; said axle of the handlebar being housed in a sleeve pivoted onto the lower perimeter frame by means of pins; said sleeve being linked to the side bars (11, 12) of the upper perimeter frame by means of two semi-cylindrical brackets which form a cylindrical cavity housing the sleeve; said semi-cylindrical brackets housing pins fastening the sleeve to the side bars (11, 12) of the upper perimeter frame itself; a fork made up of two rear bars (23, 24) and at least a traverse bar linking the rear bars (23, 24) themselves being pivoted onto the rear ends of the side bars (3, 4) of the lower perimeter frame; said fork being pivoted onto the lower perimeter frame by means of pins; a shaft, which is free to rotate on the fork, being constrained near the rear ends of the rear bars (23, 24) of the fork itself; two hubs onto which two rear wheels are mounted being fastened to the two ends of said shaft; a brake disk with attached brake caliper fastened to the fork also being keyed onto said shaft; an electric motor powered by the electric accumulators located in the electric accumulators supporting tray being installed on said fork; said electric motor driving the rear wheels; said saddle and said receptacle to hold small objects being fastened to the upper perimeter frame; said electric accumulators supporting tray being sustained by the lower perimeter frame; a space being located between the lower perimeter frame and the upper perimeter frame; a container to hold objects being housed within said space; said container to hold objects being provisionally fastened to the lower perimeter frame and on the side on side bars by retaining elements which may or may not be elastic.