To easily fold a baby carriage by defining a handle part including a movable member by one part of a frame, and connecting the movable part to at least one latch member so as to generate force having sufficient energy for slidably releasing at least the latch member.

This baby carriage includes a frame 102 having a handle part 104. The handle part includes a grip part 108. The carriage includes a baby supporting part 108 used for supporting the baby the proper number of wheels 110 so as to facilitate carrying, and at least one locking device. The locking device is constituted so as to fold the baby carriage from the developed position to the folded position. It includes a movable member 114 which can favorably operate the baby carriage by one hand and fold it by moving at least one lock device 112.