A DC relay having an auxiliary contact, the DC relay comprising: a housing; main contacts (17, 18) installed at a portion of the housing; and an auxiliary contact installed at another portion of the housing, wherein a partition is installed in a longitudinal direction inside the housing to provide a first accommodating part and a second accommodating part, the main contacts (17, 18) are installed in the first accommodating part, and the auxiliary contact is installed in the second accommodating part, wherein the main contacts include a fixed contact installed in a penetrating manner on an upper surface of the first accommodating part and a movable contact movably installed in the first accommodating part and brought into contact with the fixed contact or separated therefrom, characterized in that the DC relay further comprises: a driving shaft coupled to the movable contact and configured to move the movable contact up and down; a middle plate dividing an actuator part and a contact part that includes the main contacts; a switch cooperatively operating according to an operational state of the main contacts and transferring a corresponding signal to the auxiliary contact, wherein the switch includes a switch lever; an auxiliary contact mounting bracket provided on an upper side of the middle plate and in the second accommodating part, wherein the switch is installed on the auxiliary contact mounting bracket; and a lever coupled to the switch lever of the switch, wherein in response to the driving shaft being lifted, the movable contact is lifted to be coupled to the fixed contact and the lever is lifted to press the switch lever to operate the switch, which transmits the corresponding signal to the auxiliary contact. a housing; main contacts (17, 18) installed at a portion of the housing; and an auxiliary contact installed at another portion of the housing, wherein a partition is installed in a longitudinal direction inside the housing to provide a first accommodating part and a second accommodating part, the main contacts (17, 18) are installed in the first accommodating part, and the auxiliary contact is installed in the second accommodating part, wherein the main contacts include a fixed contact installed in a penetrating manner on an upper surface of the first accommodating part and a movable contact movably installed in the first accommodating part and brought into contact with the fixed contact or separated therefrom, characterized in that the DC relay further comprises: a driving shaft coupled to the movable contact and configured to move the movable contact up and down; a middle plate dividing an actuator part and a contact part that includes the main contacts; a switch cooperatively operating according to an operational state of the main contacts and transferring a corresponding signal to the auxiliary contact, wherein the switch includes a switch lever; an auxiliary contact mounting bracket provided on an upper side of the middle plate and in the second accommodating part, wherein the switch is installed on the auxiliary contact mounting bracket; and a lever coupled to the switch lever of the switch, a driving shaft coupled to the movable contact and configured to move the movable contact up and down; a middle plate dividing an actuator part and a contact part that includes the main contacts; a switch cooperatively operating according to an operational state of the main contacts and transferring a corresponding signal to the auxiliary contact, wherein the switch includes a switch lever; an auxiliary contact mounting bracket provided on an upper side of the middle plate and in the second accommodating part, wherein the switch is installed on the auxiliary contact mounting bracket; and a lever coupled to the switch lever of the switch, wherein in response to the driving shaft being lifted, the movable contact is lifted to be coupled to the fixed contact and the lever is lifted to press the switch lever to operate the switch, which transmits the corresponding signal to the auxiliary contact.