To easily and safely place a baby on or take it off a carriage and carry the baby and to prevent the injury of the baby's hands, feed or head caused by contact with a safety guard during placing the baby on or take it off or traveling.

In the vicinity of the lower end parts of both handle pipes 2 of a backrest 1, the rear ends of inner members having proper lengths are supported between the left and right arm supporting parts 6 of a chassis 5 for mounting a seat 4 via supporting members 7 so as to be freely folded to the backrest 1 side and, in these inner members, a safety guard 8 for guarding a baby is supported via an automatic locking mechanism to be freely slid so as to be locked in a proper position.