Abstract: A one-piece highchair cover made out of washable fabric material such as nylon and which is designed to fit over and be retained on a highchair by having side openings to accommodate the respective side arms and/or highchair tray of the highchair, openings to accommodate a fastening means such as a seatbelt to retain the highchair cover on the highchair, and a stretchable rear fastening means such as a strap to retain the back portion of the highchair cover on the highchair, all of which enables the highchair to be fully protected and covered while permitting the baby to aggressively move around in the highchair while being fed and insures that the highchair cover will remain in its position and not expose a portion of the highchair or fall off the highchair during the feeding process. The washable fabric material also enables the removable highchair cover to be easily removed from the highchair so that it can be washed for subsequent use.