An electrical device connector (100, 400) comprising: a bus conductor including through holes extending in an axis-orthogonal direction orthogonal to an axial direction of the bus conductor, the bus conductor being configured to electrically connect a plurality of switchgears to each other; insulation plugs each having one end connectable to an electrical device which is connectable to the bus conductor, the insulation plugs each being configured to electrically insulate the electrical device and the bus conductor; terminal members (30, 40) each including a bus conductor support portion (31, 41) which has a hollow cylindrical shape extending in the axial direction and in which the bus conductor is inserted, the terminal members (30, 40) each further including an electrical device connection portion (32, 42) which extends in the axis-orthogonal direction and in which the corresponding insulation plug is inserted and fixed, wherein, at an insulation boundary surface portion which is a boundary portion between an outer circumferential surface of the insulation plug and an inner circumferential surface of the electrical device connection portion (32, 42), the outer circumferential surface of the insulation plug and the inner circumferential surface of the electrical device connection portion (32, 42) are in close contact with each other while exerting a predetermined surface pressure to each other; and fixing members each having one end fixable to the corresponding switchgear and each extending in the axis-orthogonal direction through the corresponding through hole, the fixing members each fixing the corresponding insulation plug at the other end, characterized in that the bus conductor includes a hollow portion extending in the axial direction, wherein gaps are each formed between the corresponding fixing member and the bus conductor so as to allow communication between the hollow portion and an internal space of the corresponding terminal member (30, 40). a bus conductor including through holes extending in an axis-orthogonal direction orthogonal to an axial direction of the bus conductor, the bus conductor being configured to electrically connect a plurality of switchgears to each other; insulation plugs each having one end connectable to an electrical device which is connectable to the bus conductor, the insulation plugs each being configured to electrically insulate the electrical device and the bus conductor; terminal members (30, 40) each including a bus conductor support portion (31, 41) which has a hollow cylindrical shape extending in the axial direction and in which the bus conductor is inserted, the terminal members (30, 40) each further including an electrical device connection portion (32, 42) which extends in the axis-orthogonal direction and in which the corresponding insulation plug is inserted and fixed, wherein, at an insulation boundary surface portion which is a boundary portion between an outer circumferential surface of the insulation plug and an inner circumferential surface of the electrical device connection portion (32, 42), the outer circumferential surface of the insulation plug and the inner circumferential surface of the electrical device connection portion (32, 42) are in close contact with each other while exerting a predetermined surface pressure to each other; and fixing members each having one end fixable to the corresponding switchgear and each extending in the axis-orthogonal direction through the corresponding through hole, the fixing members each fixing the corresponding insulation plug at the other end, characterized in that the bus conductor includes a hollow portion extending in the axial direction, wherein gaps are each formed between the corresponding fixing member and the bus conductor so as to allow communication between the hollow portion and an internal space of the corresponding terminal member (30, 40).