A needle disc roller apparatus comprising: a connection cap; a roller guiding holder coupled to a front end of the connection cap; and a needle disc roller, wherein the needle disc roller comprises: a roller bracket; a core rotation shaft rotatably installed for the roller bracket, a roller bobbin rotatably installed for the core rotation shaft; and a plurality of ring-shaped needle discs and a plurality of ring-shaped spacers that are all restrained by the roller bobbin and rotate about the core rotation shaft together with the roller bobbin, the roller bracket comprises: a base portion; and a pair of shaft mounting walls (222 and 222) vertically formed on both sides of the front surface of the base portion, and the pair of shaft mounting walls has shaft holes (2224 and 2224) in which the core rotation shaft is rotatably fitted, characterized in that the needle disc roller being maintained so as to be movable forward and backward in the roller guiding holder; the roller bracket being installed to be rectilinearly movable forward and backward along a guide groove, wherein each of the pair of shaft mounting walls is slidably fitted in the guide groove; the needle disc roller further comprising a drug delivery mechanism for delivering a drug in a drug container to ring-shaped needle discs of the needle disc roller in response to the movement of the needle disc roller back and forth as the needle disc roller is pressed against the skin. a connection cap; a roller guiding holder coupled to a front end of the connection cap; and a needle disc roller, wherein the needle disc roller comprises: a roller bracket; a core rotation shaft rotatably installed for the roller bracket, a roller bobbin rotatably installed for the core rotation shaft; and a plurality of ring-shaped needle discs and a plurality of ring-shaped spacers that are all restrained by the roller bobbin and rotate about the core rotation shaft together with the roller bobbin, the roller bracket comprises: a base portion; and a pair of shaft mounting walls (222 and 222) vertically formed on both sides of the front surface of the base portion, and the pair of shaft mounting walls has shaft holes (2224 and 2224) in which the core rotation shaft is rotatably fitted, characterized in that the needle disc roller being maintained so as to be movable forward and backward in the roller guiding holder; the roller bracket being installed to be rectilinearly movable forward and backward along a guide groove, wherein each of the pair of shaft mounting walls is slidably fitted in the guide groove; the needle disc roller further comprising a drug delivery mechanism for delivering a drug in a drug container to ring-shaped needle discs of the needle disc roller in response to the movement of the needle disc roller back and forth as the needle disc roller is pressed against the skin. a roller bracket; a core rotation shaft rotatably installed for the roller bracket, a roller bobbin rotatably installed for the core rotation shaft; and a plurality of ring-shaped needle discs and a plurality of ring-shaped spacers that are all restrained by the roller bobbin and rotate about the core rotation shaft together with the roller bobbin, the roller bracket comprises: a base portion; and a pair of shaft mounting walls (222 and 222) vertically formed on both sides of the front surface of the base portion, and the pair of shaft mounting walls has shaft holes (2224 and 2224) in which the core rotation shaft is rotatably fitted, characterized in that the needle disc roller being maintained so as to be movable forward and backward in the roller guiding holder; the roller bracket being installed to be rectilinearly movable forward and backward along a guide groove, wherein each of the pair of shaft mounting walls is slidably fitted in the guide groove; the needle disc roller further comprising a drug delivery mechanism for delivering a drug in a drug container to ring-shaped needle discs of the needle disc roller in response to the movement of the needle disc roller back and forth as the needle disc roller is pressed against the skin. a base portion; and a pair of shaft mounting walls (222 and 222) vertically formed on both sides of the front surface of the base portion, and the pair of shaft mounting walls has shaft holes (2224 and 2224) in which the core rotation shaft is rotatably fitted, characterized in that the needle disc roller being maintained so as to be movable forward and backward in the roller guiding holder; the roller bracket being installed to be rectilinearly movable forward and backward along a guide groove, wherein each of the pair of shaft mounting walls is slidably fitted in the guide groove; the needle disc roller further comprising a drug delivery mechanism for delivering a drug in a drug container to ring-shaped needle discs of the needle disc roller in response to the movement of the needle disc roller back and forth as the needle disc roller is pressed against the skin.