An electromagnetic contact device, comprising: a contactor holder which is configured to move a mounted movable contactor according to a displacement of a movable core forming an electromagnet, with the contactor holder being accommodated together with the electromagnet in a case, wherein the case has: a lower case portion which accommodates the electromagnet, wherein the electromagnet is positioned such that a fixed core and the movable core are opposed, and an upper case portion which engages with the lower case portion while stacked on the lower case portion, and which accommodates the contactor holder advanced for the accommodation from above, so that, in assembly of the contact device, constituent components can be incorporated by drop-in insertion in the order of lower case portion, electromagnet and upper case portion, the upper case portion of the case supports, by insertion into a hole therewithin, an operation lever which is linked to the movable core of the electromagnet accommodated in the lower case portion; characterized in that the electromagnet is a DC-only electromagnet; and in that the electromagnetic contact device is configured such that, when an external command causes a current to be passed through an electromagnetic coil of the electromagnet to perform excitation, the movable core is attracted to the fixed core and is displaced by sliding in a first direction, thereby causing the contact holder, which is linked via the operation lever to the movable core, to slide and move in the first direction such that the movable contactor performs a switching action. a contactor holder which is configured to move a mounted movable contactor according to a displacement of a movable core forming an electromagnet, with the contactor holder being accommodated together with the electromagnet in a case, wherein the case has: a lower case portion which accommodates the electromagnet, wherein the electromagnet is positioned such that a fixed core and the movable core are opposed, and an upper case portion which engages with the lower case portion while stacked on the lower case portion, and which accommodates the contactor holder advanced for the accommodation from above, so that, in assembly of the contact device, constituent components can be incorporated by drop-in insertion in the order of lower case portion, electromagnet and upper case portion, a lower case portion which accommodates the electromagnet, wherein the electromagnet is positioned such that a fixed core and the movable core are opposed, and an upper case portion which engages with the lower case portion while stacked on the lower case portion, and which accommodates the contactor holder advanced for the accommodation from above, so that, in assembly of the contact device, constituent components can be incorporated by drop-in insertion in the order of lower case portion, electromagnet and upper case portion, the upper case portion of the case supports, by insertion into a hole therewithin, an operation lever which is linked to the movable core of the electromagnet accommodated in the lower case portion; characterized in that the electromagnet is a DC-only electromagnet; and in that the electromagnetic contact device is configured such that, when an external command causes a current to be passed through an electromagnetic coil of the electromagnet to perform excitation, the movable core is attracted to the fixed core and is displaced by sliding in a first direction, thereby causing the contact holder, which is linked via the operation lever to the movable core, to slide and move in the first direction such that the movable contactor performs a switching action.