A vehicle lamp comprising: light irradiation units (60a, 60b) each including a light source and a board (40a, 40b, 340a, 340b) having the light source installed thereon; a base member (70, 370) including a first side for mounting the light irradiation units (60a, 60b) thereon and a second side neighboring the first side; and a pin block (50, 350) mounted on the second side of the base member (70, 370), wherein the pin block (50, 350) includes: connection terminals (55, 355) arranged on the second side of the base member (70, 370), extending and protruding in a direction normal to the first side, wherein the connection terminals (55, 355) correspond respectively to the light irradiation units (60a, 60b); a body accommodating electric connection means that extends from the connection terminals (55, 355); and a connection socket formed on one side of the body and electrically connected to the electric connection means, wherein each board (40a, 40b, 340a, 340b) has a coupling member (30, 39, 331) arranged thereon, being electrically connected with the respective light source, wherein the each connection terminal (55, 355) is configured for being electrically connected with the corresponding coupling member (30, 39, 331) by being inserted into said coupling member (30, 39, 331) when the respective board (40a, 40b, 340a, 340b) is mounted on the first side of the base member (70, 370), wherein the electric connection means includes a plurality of wirings, wherein one end of the plurality of wirings is electrically connected to the light irradiation units (60a, 60b) and the other end is electrically connected to the connection socket, and wherein the vehicle lamp further comprises a plug configured to detachably couple with the connection socket, the plug including a cable that is adapted to electrically connect the connection socket to an external device; and a return wiring electrically connecting, among the plurality of wirings, at least one pair of wirings to each other. light irradiation units (60a, 60b) each including a light source and a board (40a, 40b, 340a, 340b) having the light source installed thereon; a base member (70, 370) including a first side for mounting the light irradiation units (60a, 60b) thereon and a second side neighboring the first side; and a pin block (50, 350) mounted on the second side of the base member (70, 370), wherein the pin block (50, 350) includes: connection terminals (55, 355) arranged on the second side of the base member (70, 370), extending and protruding in a direction normal to the first side, wherein the connection terminals (55, 355) correspond respectively to the light irradiation units (60a, 60b); a body accommodating electric connection means that extends from the connection terminals (55, 355); and a connection socket formed on one side of the body and electrically connected to the electric connection means, connection terminals (55, 355) arranged on the second side of the base member (70, 370), extending and protruding in a direction normal to the first side, wherein the connection terminals (55, 355) correspond respectively to the light irradiation units (60a, 60b); a body accommodating electric connection means that extends from the connection terminals (55, 355); and a connection socket formed on one side of the body and electrically connected to the electric connection means, wherein each board (40a, 40b, 340a, 340b) has a coupling member (30, 39, 331) arranged thereon, being electrically connected with the respective light source, wherein the each connection terminal (55, 355) is configured for being electrically connected with the corresponding coupling member (30, 39, 331) by being inserted into said coupling member (30, 39, 331) when the respective board (40a, 40b, 340a, 340b) is mounted on the first side of the base member (70, 370), wherein the electric connection means includes a plurality of wirings, wherein one end of the plurality of wirings is electrically connected to the light irradiation units (60a, 60b) and the other end is electrically connected to the connection socket, and wherein the vehicle lamp further comprises a plug configured to detachably couple with the connection socket, the plug including a cable that is adapted to electrically connect the connection socket to an external device; and a return wiring electrically connecting, among the plurality of wirings, at least one pair of wirings to each other. a cable that is adapted to electrically connect the connection socket to an external device; and a return wiring electrically connecting, among the plurality of wirings, at least one pair of wirings to each other.