Abstract: An inflatable infant sitting support device which can be used from the earliest developmental stage of learning to sit upright by an infant or a younger developmentally delayed child, consisting of four inflatable pieces and one cushioned, non-inflatable piece, which acts as the seat bottom for the device. The primary inflatable piece is “U” or horseshoe shaped and is sealed to the top of the cushioned, non-inflatable piece. There is an elongated, rectangular inflatable piece, acting as a support to keep the device from tapping over to the back, sealed to the bottom of the back of the curved section at the back of the primary inflatable piece. There is a crescent-shaped inflatable piece acting as a head and neck support and sealed to the top of the curved section at the back of the primary piece.