A dispersant for carbon nanotubes, comprising: a head covalently bonded to a tail; the head having an aromatic ring; wherein the tails are regioregularly arranged, and wherein the head is selected from the group represented by the following Formula, and the tail is selected from the group represented by the following Formula: wherein X is S, NH, or O, and l is an integer of 1 to 60, Formula (̵YO a)̵ m -(CH 2) n -Z wherein Y is selected from the group consisting of a substituted or unsubstituted alkylene group of 1 to 10 carbon atoms, a substituted or unsubstituted alkenylene group of 1 to 10 carbon atoms, a substituted or unsubstituted alkynylene group of 1 to 10 carbon atoms, and a substituted or unsubstituted arylalkylene group of 6 to 20 carbon atoms, Z is selected from the group consisting of -H, -CH 3, -OH, carboxyl acid or salts thereof, sulfonic acid or salts thereof, and phosphoric acid or salts thereof, a is 0 or 1, m is an integer of 1 to 9, and n is an integer of up to 9, wherein the ratio of the number of heads to the number of tails in the dispersant is 2 to 3. a head covalently bonded to a tail; the head having an aromatic ring; wherein the tails are regioregularly arranged, and wherein the head is selected from the group represented by the following Formula, and the tail is selected from the group represented by the following Formula: wherein X is S, NH, or O, and l is an integer of 1 to 60, Formula (̵YO a)̵ m -(CH 2) n -Z wherein Y is selected from the group consisting of a substituted or unsubstituted alkylene group of 1 to 10 carbon atoms, a substituted or unsubstituted alkenylene group of 1 to 10 carbon atoms, a substituted or unsubstituted alkynylene group of 1 to 10 carbon atoms, and a substituted or unsubstituted arylalkylene group of 6 to 20 carbon atoms, Z is selected from the group consisting of -H, -CH 3, -OH, carboxyl acid or salts thereof, sulfonic acid or salts thereof, and phosphoric acid or salts thereof, a is 0 or 1, m is an integer of 1 to 9, and n is an integer of up to 9, wherein the ratio of the number of heads to the number of tails in the dispersant is 2 to 3. X is S, NH, or O, and l is an integer of 1 to 60, Formula (̵YO a)̵ m -(CH 2) n -Z wherein Y is selected from the group consisting of a substituted or unsubstituted alkylene group of 1 to 10 carbon atoms, a substituted or unsubstituted alkenylene group of 1 to 10 carbon atoms, a substituted or unsubstituted alkynylene group of 1 to 10 carbon atoms, and a substituted or unsubstituted arylalkylene group of 6 to 20 carbon atoms, Z is selected from the group consisting of -H, -CH 3, -OH, carboxyl acid or salts thereof, sulfonic acid or salts thereof, and phosphoric acid or salts thereof, a is 0 or 1, m is an integer of 1 to 9, and n is an integer of up to 9, wherein the ratio of the number of heads to the number of tails in the dispersant is 2 to 3. wherein Y is selected from the group consisting of a substituted or unsubstituted alkylene group of 1 to 10 carbon atoms, a substituted or unsubstituted alkenylene group of 1 to 10 carbon atoms, a substituted or unsubstituted alkynylene group of 1 to 10 carbon atoms, and a substituted or unsubstituted arylalkylene group of 6 to 20 carbon atoms, Z is selected from the group consisting of -H, -CH 3, -OH, carboxyl acid or salts thereof, sulfonic acid or salts thereof, and phosphoric acid or salts thereof, a is 0 or 1, m is an integer of 1 to 9, and n is an integer of up to 9,