The Line Focus Ultrasound Massager is a skin care device utilizing a new line-focused ultrasound technology. Although conventional point-focused ultrasound devices are very high in strength, they are somewhat dangerous, and complex parts make them rather expensive. Therefore, we developed a more secure line-focused ultrasound technology. We lowered the intensity of irradiation considerably and widened the range so that the operation can be performed quickly. In addition, the simple structure reduces the unit and overall price. As a result, skin care devices are no longer exclusive to the rich, and people will soon be able to enjoy the benefits of anti-aging technology.