A ladder assembly for mounting a concealed ladder to a boat includes a frame having a pair of spaced-apart guides. The frame is adapted to be mounted within a boat. A slide is movably mounted to the guides for sliding from one end of said frame to an opposite end, and a ladder is pivotally mounted to said slide, such that the ladder can extend from a hatch in the boat and be lowered for use of the ladder in entering and exiting the water from the boat. In one embodiment, a pivot plate is pivotally mounted to the slide and the ladder is pivotally mounted to the slide. A control arm is pivotally mounted to the pivot plate or slide and provides leverage for the easy deployment and storing of the ladder.