A vehicle seat with integrated child booster device provides an integrated child booster deployable into a use position from a stowed position within a vehicle seat. The device includes a seat back coupled to and extending upwardly from a base frame. A seat bottom is slidably coupled to the base frame selectively covering and exposing an interior space of the base frame. A border section of the seat bottom is slidably coupled to the base frame and a central section of the seat bottom has an upright portion pivotally coupled to a seat portion along a first side of the central section. A second side of the central section is pivotally and slidably coupled to the border section. The upright portion is positionable adjacent to the seat back. A platform is vertically aligned under and supports the central section of the seat bottom.