The back and stomach support device is utilizable by weightlifters, stevedors, etc., and includes an elongated flexible back strap with a resilient, flexible back cushion attached to the inner surface thereof. The back strap extends forwardly at the sides of the device and ends in opposed front loops through which the opposite ends of a front belt extend. To the inner surface of the front belt is connected a resilient, flexible stomach cushion. The front belt can be cinched tight by means of its opposite ends and be releasably held in place for example by hook-bearing strips and hook-receiving strips on the belt. The device encircles the waist and effectively supports both back and stomach to prevent muscle strain. The strap and belt are shorter in height than the cushions so that no pinching of the skin occurs during tightening. The opposite ends of the cushions may be tapered down for a similar reason and the cushions are short enough not to intercept each other. Preferably, they are of flexible foamed plastic, while the belt and strap are preferably of unfoamed flexible plastic. Detachable shoulder suspenders may be connected to the cushions and/or strap and belt to hold the device loosely in place when not needed.