A pedal scooter comprising a support frame mounted on a front bridge and a rear bridge, a chain drive system connected to a drive pedal extended longitudinally and hinged to the support frame, and a handlebar mounted on a vertical arm at the front end of the support frame, characterized in that - the support frame is hinged to the front bridge via front carriers mounted laterally and symmetrically on both sides of the support frame at an angle of 25 °-35 ° to its longitudinal horizontal axis, and - in the rear the support frame is hinged via a bearing shaft to the rear bridge, which is composed of a rear axle with rear wheels camped to it, the rear axle being mounted via a holder on the bearing shaft camped in a rear bearing box located at the rear of the support frame at an angle of 25-35 ° with respect to its longitudinal axis, - the front bridge is composed of two bearing boxes hinged to the front carriers and connected to one another by means of a rack, whereby in the bearing boxes are camped the front shafts of two front wheels, each of the front shafts being connected by means of a cardan coupling to a drive shaft camped on the support frame, on which support frame, symmetrically to its longitudinal axis are mounted a first one-way clutch and a second one-way clutch, respectively connected to a first drive chain wheel and a second drive chain wheel, - whereby the chain drive system is composed of a first drive chain and a second drive chain, wherein the first drive chain is mounted on a first parasitic chain wheel and on the first drive chain wheel and is hinged to a first movable axle mounted to the front of the drive pedal, and - the second drive chain is mounted on a second parasitic chain wheel and on the second drive chain wheel and is hinged to a second movable axle mounted to the front of the drive pedal, - whereby the two parasitic chain wheels (24, 25) are camped to a parasitic axis mounted in the upper part of the vertical arm of the support frame parallel to the drive shaft, and - a braking device, mounted to the holder of the rear axle, is connected by means of a braking cable with a brake handle mounted on the handlebar. - the support frame is hinged to the front bridge via front carriers mounted laterally and symmetrically on both sides of the support frame at an angle of 25 °-35 ° to its longitudinal horizontal axis, and - in the rear the support frame is hinged via a bearing shaft to the rear bridge, which is composed of a rear axle with rear wheels camped to it, the rear axle being mounted via a holder on the bearing shaft camped in a rear bearing box located at the rear of the support frame at an angle of 25-35 ° with respect to its longitudinal axis, - the front bridge is composed of two bearing boxes hinged to the front carriers and connected to one another by means of a rack, whereby in the bearing boxes are camped the front shafts of two front wheels, each of the front shafts being connected by means of a cardan coupling to a drive shaft camped on the support frame, on which support frame, symmetrically to its longitudinal axis are mounted a first one-way clutch and a second one-way clutch, respectively connected to a first drive chain wheel and a second drive chain wheel, - whereby the chain drive system is composed of a first drive chain and a second drive chain, wherein the first drive chain is mounted on a first parasitic chain wheel and on the first drive chain wheel and is hinged to a first movable axle mounted to the front of the drive pedal, and - the second drive chain is mounted on a second parasitic chain wheel and on the second drive chain wheel and is hinged to a second movable axle mounted to the front of the drive pedal, - whereby the two parasitic chain wheels (24, 25) are camped to a parasitic axis mounted in the upper part of the vertical arm of the support frame parallel to the drive shaft, and - a braking device, mounted to the holder of the rear axle, is connected by means of a braking cable with a brake handle mounted on the handlebar.