A release actuator can comprise a support element, a latch mechanism, a release button movably assembled with the support element, a transmission element connecting the latch mechanism with the release button, and a safety latch key disposed adjacent to the release button. The release button can be movable parallel to a first axis for driving unlocking operation of the latch mechanism. The safety latch key and the release button are assembled so as to be movable relative to each other parallel to a second axis for either blocking or unblocking movements of the release button parallel to the first axis. Moreover, one embodiment of an infant carrying apparatus is also described.