Abstract: A foldable stroller frame includes a pair of front wheel support rods, a U-shaped handle with two arms, each of which is slidable relative to a respective one of said front wheel support rods between a first position, wherein the stroller frame is unfolded and wherein the arm is locked to the front wheel support rod so as to prevent movement relative to the front wheel support rod, and a second position, wherein the stroller frame is folded, and a pair of rear wheel support rods. A lock device is fixed to an upper end portion of each of the front wheel support rods and is connected slidably to a respective one of the arms in order to lock the arm in the first position against movement relative to the front wheel support rod when the stroller frame is unfolded. A pivot link is mounted slidably to each of the front wheel support rods and is fixed to a respective one of the arms. An upper end portion of a respective one of the rear wheel support rods is pivoted to the pivot link.