The invention discloses a baby carriage, The baby carriage comprises a vehicle frame, the vehicle frame comprises a rear legs, a front leg and a handle stem, wherein the front leg and the handle stemare correspondingly matched with the rear legs in a rotating mode, the vehicle frame provided with an unfolding state and a folding state, a linkage assembly for switching the states of the vehicle frame is connected among the rear legs, the front leg and the handle stem, the handle stem is provided with a base used for installing a seat, the seat comprises a fixing seat body and a seat plate which are rotatably installed with each other, and the fixing seat body is provided with an adaptation structure corresponding to the base; and a first vehicle frame locking mechanism for keeping the vehicle frame in the unfolding state is arranged between the handle stem and the front leg, a linkage piece is movably installed on the base, the linkage piece keeps the first vehicle frame locking mechanism in the locking state when the linkage piece is pressed by the seat plate, and the first vehicle frame locking mechanism is released when the seat plate is far away from the linkage piece.