Abstract: A folding tricycle, maximizing the exercise effect by allowing a user to pedal the tricycle while standing up on the pedals, as well as being easy to move and carry by being folded to be of a small size, is disclosed. The folding tricycle has a running unit consisting of a main frame, two front wheels, and a rear wheel. The main frame consists of two frame parts with a first folding part joining the two frame parts together, thus being foldable at the folding part. The two frame parts respectively have a front wheel shaft housing and a rear wheel support assembly. The tricycle also has steering unit used for steering the rear wheel. The steering unit has a second folding part, thus being foldable at the second folding part. The tricycle also has a brake unit used for selectively braking the front wheels.