Abstract: A folding collapsible step exerciser including a base frame, a front upright pivoted to a front side of the base frame and locked in a vertical position by a lock screw, a driving wheel revolvably supported on the base frame and having a double crnak type fixed wheel shaft, a damping wheel turned with the driving wheel, a friction belt mounted on the base frame and adapted to import a friction resistance to the damping wheel, two handlebars bilaterally pivoted to the front upright, and two pedals having a respective front end respectively pivoted to the bottom ends of the handlebars and a respective rear end respectively Pivoted to the two ends of the double crank type wheel shaft of the driving wheel, wherein one pedal has a U-frame invertedly and fixedly secured to its rear end, the U-frame having two screw holes aligned at its two parallel side walls; one end of the fixed wheel shaft of the driving wheel has a screw hole mounted with a screw bolt to hold a barrel, the barrel being coupled to the U-frame an

Abstract: A folding collapsible step exerciser including a base frame, a front upright pivoted to a front side of the base frame and locked in a vertical position by a lock screw, a driving wheel revolvably supported on the base frame and having a double crank type wheel shaft, a damping wheel turned with the driving wheel, a friction belt mounted on the base frame and adapted to impart a friction resistance to the damping wheel, two handlebars bilaterally pivoted to the front upright, and two pedals having a respective front end respectively pivoted to the bottom ends of the handlebars and a respective rear end respectively pivoted to the two ends of the double crank type wheel shaft of the driving wheel.