1. A device for skin care, comprising: a main body； a vibration unit mounted on the main body with the possibility of separation； and an ultrasonic generation section mounted inside the vibration unit to generate vibration, in which the vibration unit comprises a skin contact member provided with a protrusion in the form of a tube for transmitting ultrasonic vibration generated by the ultrasonic generation section to the skin. 2. A skin care device according to claim 1, wherein a plurality of protrusions are formed periodically and have a tube shape. The skin care device of claim 2, wherein the plurality of protrusions in the form of a tube are arranged radially at predetermined intervals from the center of the vibration unit. The skin care device of claim 2, wherein the plurality of protrusions in the form of a tube are randomly spaced at predetermined intervals. A skin care device according to any one of paragraphs. 2-4, in which the protrusion in the form of a tube has in cross section the shape of a cylinder, ellipse or polygon. 6. A skin care device according to any one of paragraphs. 2-4, in which the protrusion in the form of a tube has a curved section, which is formed by curved at one end of the end section in contact with the skin. A skin care device according to claim 1, wherein the protrusion in the form of a tube is made of a metal material. The skin care device according to claim 1, wherein the vibration unit comprises: a housing into which an ultrasonic generation section and a skin contact element are inserted； and a front cover connected with the possibility of separation with a hole in the housing, to prevent separation of the ultrasonic generation section and the skin contact element from the housing, in which the housing is connected to1. Устройство для ухода за кожей, содержащее:основной корпус；блок вибрации, устанавливаемый на основной корпус с возможностью отделения； иучасток ультразвуковой генерации, установленный внутри блока вибрации, чтобы
