Abstract: A toddler tricycle folding footboard structure consisting of a shaft hole formed through the lateral surfaces of a connective tube positioned between the rear and front brace of a toddler tricycle frame that is aligned with the shaft holes in the vertical extremities of a pair of L-shaped bracket members, a bolt inserted through the shaft holes, and a nut fastened onto it to effect a tight conjoinment, following which the pair of L-shaped bracket members remain movable at the shaft hole in the lateral surfaces of the connective tube. The horizontal extremities at the bottom aspects of the L-shaped bracket members facing outward from the two sides of the connective tube are then conjoined to a footboard such that they become a unitary structural entity, with the bolt functioning as an axle that enables free swinging for folding and unfolding to reduce space occupancy and facilitate utilization convenience.