Abstract: A foldable stroller includes a linkage and an engaging mechanism; the linkage includes a slider connected to the rear frame, a pull rod connected between the slider and the upper frame, and/or between the slider and the lower frame, and struts whose middles are pivoted each other, with two ends of each strut connected to the rear frame, and the sliders connected to the struts so as to actuate the struts to pivot each other; and the engaging mechanism is formed on the rear frame to restrict a sliding motion of the slider. The structure is simple and handy, and the stroller can be folded due to the gravity of the upper and lower frames when operating the engaging mechanism, which needs small strength of the user.