A vehicular lamp comprising: a light source that emits light; a lamp body, inside of which the light source is arranged; a circuit board that has a conductive pattern that functions as an electrically-conducting path of drive current to be supplied to the light source, and on one end portion of which an electrode portion connected to the conductive pattern is formed; a socket (6; 6A) connected to the lamp body; and a contact member (19; 19A) that is arranged in the socket (6; 6A) and has an elastically deformable connecting terminal portion connected to the electrode portion of the circuit board, and a plug connecting portion, to which a power supply plug is connected, wherein the circuit board is pressed by restoring force of the connecting terminal portion, elastically deformed, so as to be held by the contact member (19; 19A), wherein the vehicular lamp comprises further an engaging portion (12, 20a; 26, 21c) that prevents relative movement of the contact member (19; 19A) with respect to the lamp body in a longitudinal direction of the plug connecting portion, wherein the engaging portion (12, 20a; 26, 21c) is configured not to prevent the relative movement of the contact member (19; 19A) to a fixation position, at which the contact member (19; 19A) is fixed, during assembly of the contact member (19; 19A) and configured to prevent the relative movement of the contact member (19; 19A) from the fixation position, characterized in that the engaging portion (12, 20a; 26, 21c) includes: an engaging protrusion (12; 26) that is provided on the lamp body, and has an engaging surface (12a; 26a) that faces in a direction of the relative movement, during assembly, of the contact member (19; 19A) with respect to the lamp body; and a first elastic engagement portion (20a; 21c) that is provided on the contact member (19; 19A), that is inclined such that an amount of jutting-out of the first elastic engagement portion (20a; 21c) from the contact member (19; 19A) increases in a direction opposite the direction of the relative movement, during assembly, of the contact member (19; 19A) with respect to the lamp body, and that is formed by cutting and bending up a portion of the contact member (19; 19A). a light source that emits light; a lamp body, inside of which the light source is arranged; a circuit board that has a conductive pattern that functions as an electrically-conducting path of drive current to be supplied to the light source, and on one end portion of which an electrode portion connected to the conductive pattern is formed; a socket (6; 6A) connected to the lamp body; and a contact member (19; 19A) that is arranged in the socket (6; 6A) and has an elastically deformable connecting terminal portion connected to the electrode portion of the circuit board, and a plug connecting portion, to which a power supply plug is connected, wherein the circuit board is pressed by restoring force of the connecting terminal portion, elastically deformed, so as to be held by the contact member (19; 19A), wherein the vehicular lamp comprises further an engaging portion (12, 20a; 26, 21c) that prevents relative movement of the contact member (19; 19A) with respect to the lamp body in a longitudinal direction of the plug connecting portion, an engaging protrusion (12; 26) that is provided on the lamp body, and has an engaging surface (12a; 26a) that faces in a direction of the relative movement, during assembly, of the contact member (19; 19A) with respect to the lamp body; and a first elastic engagement portion (20a; 21c) that is provided on the contact member (19; 19A), that is inclined such that an amount of jutting-out of the first elastic engagement portion (20a; 21c) from the contact member (19; 19A) increases in a direction opposite the direction of the relative movement, during assembly, of the contact member (19; 19A) with respect to the lamp body, and that is formed by cutting and bending up a portion of the contact member (19; 19A).