Abstract: This invention relates to a safety device to prevent a baby carriage from being misfolded and in particular to one including a handlebar, two engaging members and two linking rods with a protuberance on each rod. An actuating lever releases the engaging members from the protuberances of the linking rods and a stop block is provided at one side of the rear supports to block the released engaging member from moving further backwardly at the same side. A pair of front supports and rear supports are also provided. The handlebar, the front supports and the linking rods rotate on three axes when the stop block is depressed and the engaging members have passed the stop block.