A foldable toy stroller includes two main rods and two extension rods whose upper ends are mounted to lower ends of the main rods. Lower ends of the extension rods are rotatably mounted to two ends of a front-wheel base. A sliding seat is slidably mounted on a central rod having an end connected to the front-wheel base. Two rear wheel support rods are provided and each include a first end pivotably connected to the front wheel base and a second end to which a rear wheel is mounted. Pivotably connected to the sliding seat are two struts whose upper ends are pivotably connected to upper ends of the main rods. Two connecting rods are pivotably connected between the rear wheel support rods and the sliding seat. Each rear wheel support rod and each connecting rod are pivotable toward or away from the central rod for folding or unfolding operation.