The present invention involves a new and improved stable and portable bath transfer system that provides a disabled person complete access to bathroom facilities without having to transfer apparatus. The invention comprises a chair portion, a connector bridge portion, and a bathtub portion. The chair portion includes a base section with two or more support members and an upper chassis section including an adjustable backrest, a collapsible chair seat, and two swing-away armrests. The connector bridge portion includes connecting members attached by a cross member. The bathtub portion includes a base and four adjustable support members that provide increased stability and fine adjustment capability to match the chair portion height. The bath transfer system includes an interlocking system containing a continuous groove and lipped brackets to prevent the upper chassis section from tipping or lifting, and anti-roll mechanisms and a volitional latch to prevent undesired sliding of the upper chassis.