A baby carriage folded so as to be reduced in dimension in the width direction comprises a body frame (10) and a seat hammock (20). The body frame includes a seating surface supporting member (11) and a pair of side vertical frame members (12). The seat hammock includes a seating surface sheet part (21) and a backrest sheet part (22). The seating surface sheet part (21) includes a seating surface core (53) and the backrest sheet part (22) includes a back surface core (52). The seating surface core (53) and the back surface core (52) are constituted by a core continuously extending from the seating surface sheet part (21) to the backrest sheet part (22).