A tattooing apparatus, comprising: a tattoo needle; and upward and downward moving means to transmit a rotating force of a driving motor to the tattoo needle, wherein the upward and downward moving means consists of a cam structure to convert a rotary movement by a rotating force of the driving motor into a linear movement, and comprises a bearing member (129a, 129b, 229a, 229b) for rolling contact to reduce vibrations and noises, wherein the upward and downward moving means comprises: a cam member (23, 123) having a cam plate (23, 123a) inclined to one side, the cam plate being rotatable by the driving motor; a connecting rod to transmit a power to the tattoo needle; and a cam link to travel back and forth in connection with the rotation of the cam member thus to transmit the power to the connecting rod, characterized in that wherein the bearing member (129a, 129b, 229a, 229b) is disposed at a side of the cam link to come in rolling contact with upper and lower ends of the one side of the cam plate (23a, 123a), and wherein the cam link comprises: a link column (27a, 127a); an upper link bar (27b, 127b, 227b) projected at one side of the link column and hinged with one end of the connecting rod; and a pair of supporting protrusions (128a, 128b, 228a, 228b) projected at one side of the link column and disposed in a spaced-apart relation with each other to allow the one side of the cam plate to be inserted therein. a tattoo needle; and upward and downward moving means to transmit a rotating force of a driving motor to the tattoo needle, wherein the upward and downward moving means consists of a cam structure to convert a rotary movement by a rotating force of the driving motor into a linear movement, and comprises a bearing member (129a, 129b, 229a, 229b) for rolling contact to reduce vibrations and noises, wherein the upward and downward moving means comprises: a cam member (23, 123) having a cam plate (23, 123a) inclined to one side, the cam plate being rotatable by the driving motor; a connecting rod to transmit a power to the tattoo needle; and a cam link to travel back and forth in connection with the rotation of the cam member thus to transmit the power to the connecting rod, characterized in that a cam member (23, 123) having a cam plate (23, 123a) inclined to one side, the cam plate being rotatable by the driving motor; a connecting rod to transmit a power to the tattoo needle; and a cam link to travel back and forth in connection with the rotation of the cam member thus to transmit the power to the connecting rod, characterized in that wherein the bearing member (129a, 129b, 229a, 229b) is disposed at a side of the cam link to come in rolling contact with upper and lower ends of the one side of the cam plate (23a, 123a), and wherein the cam link comprises: a link column (27a, 127a); an upper link bar (27b, 127b, 227b) projected at one side of the link column and hinged with one end of the connecting rod; and a pair of supporting protrusions (128a, 128b, 228a, 228b) projected at one side of the link column and disposed in a spaced-apart relation with each other to allow the one side of the cam plate to be inserted therein. a link column (27a, 127a); an upper link bar (27b, 127b, 227b) projected at one side of the link column and hinged with one end of the connecting rod; and a pair of supporting protrusions (128a, 128b, 228a, 228b) projected at one side of the link column and disposed in a spaced-apart relation with each other to allow the one side of the cam plate to be inserted therein.