Provided is a relay connector including: a housing body, the housing body includes a first and a second protruding portion protruding outward from an outer surface of the housing body, the first protruding portion includes a first contact surface orthogonal to a first direction, and the first contact surface is provided in such a manner that at least a part of the first contact surface is visible as the relay connector is viewed from the first contact surface side along the first direction, and the second protruding portion includes a second contact surface orthogonal to a second direction perpendicular to the first direction, and the second contact surface is provided in such a manner that at least a part of the second contact surface is visible as the relay connector is viewed from the second contact surface side along the second direction.

Disclosed is an electrical contact terminal having elasticity, which is fitted into a through-hole defined on a substrate so as to electrically connect a conductive pattern defined on the substrate to an object. A core of the electrical contact terminal includes a body part having a first width with a uniform dimension in a longitudinal direction, an insertion part having a second width with a dimension less than that of the first width and extending vertically downward from the body part, and a contact part protruding in the form of a wing from each of both sides of an end of the insertion part in a width direction, wherein the body part, the insertion part, and the contact part are provided as a single body.

Disclosed is an electrical contact terminal having elasticity, which is fitted into a through-hole defined on a substrate so as to electrically connect a conductive pattern defined on the substrate to an object. A core of the electrical contact terminal includes a body part having a first width with a uniform dimension in a longitudinal direction, an insertion part having a second width with a dimension less than that of the first width and extending vertically downward from the body part, and a contact part protruding in the form of a wing from each of both sides of an end of the insertion part in a width direction, wherein the body part, the insertion part, and the contact part are provided as a single body.