Information on smooth swallowing posture and swallowing function training is described in the medical literature. A dining chair was developed in Japan to protect the elderly from aspiration and aspiration pneumonia. We thought that if the function effect of the dining chair was actually exhibited, it would be vital information to all the elderly whose swallowing function continues to decline. We tried the verification test with electromyograph about the actual functional effect of the developed dining chair. Eating with the neck forward flexion (NFF) posture by the upright pelvis fixed support has shown a smooth swallowing effect which can be valuable information to elderly people around the world, whose swallowing function continues to decline.