A stroller is adapted to be connected with a car seat, and includes a frame, a footrest, and at least one locking device. The frame has two seat rods. The footrest is disposed between the seat rods, and includes two side rod sections and a middle rod section having two ends connected respectively and pivotally to the side rod sections. The locking device is disposed between one of the side rod sections and a corresponding one of the seat rods, and includes an angle-limiting mechanism and an actuator operable to cooperate with the angle-limiting mechanism so as to adjust the footrest among a plurality of angular positions including an erected position whereat the stroller is connectable with the car seat.