An automatic hidden latch structure includes: a base secured in position to a close side of a door, the base having a positioning plate for positioning and a receiving portion and a block portion disposed at one side of the positioning plate; a transmission mechanism including a lock tongue disposed in and protruding from the receiving portion, a transmission member abutting against the lock tongue, a rotating member driven by the transmission member, and an engaging member engaging with the rotating member and protruding from the receiving portion, a first elastic element insertably engaing the engaging member, and a second elastic element mounted on a joining member of the engaging member and insertably engaging the joining member. Given actuation of the mechanism, a latch post of the automatic hidden latch structure protrudes from the door whenever the lock tongue is pressed upon, thereby locking the door.