A baby carriage comprises a backrest frame, a sheet of canvas spreaded out on the frame, the sheet having a backrest portion and a head frame located above the backrest portion, the head frame being bandable into an L-shaped form as viewed from either side, and a device mounted on the back of the backrest portion and the head frame for setting the head frame, the device comprising a base frame, an anchoring rod slidably mounted in the base frame and a receiving frame capable of engaging with the rod, whereby the devices permits angular movement of the backrest portion.