A device connector to be attached to a case of a device, comprising: a plate (30; 130) made of a plate material as a base material, formed with an opening (31; 131) penetrating in a plate thickness direction of the plate material and to be attached and fixed to the case of the device; a connector housing (50; 150) made of synthetic resin and fixed to the plate (30; 130), wherein the connector housing (50; 150) is fixed to the plate (30; 130) by molding; and at least one terminal fitting (10; 110) held in the connector housing (50; 150) while penetrating through the opening (31; 131); wherein: the connector housing (50; 150) includes a fixing portion (52; 152) which at least partly covers an opening edge portion of the opening (31; 131) while exposing an outer peripheral edge portion of the plate (30; 130); and the fixing portion (52; 152) includes a one-side sliding portion (52A; 152A) slidable relative to one surface side of the plate (30; 130), an other-side sliding portion (52B; 152B) slidable relative to the other surface side of the plate (30; 130) and a coupling portion (52C; 152C) substantially arranged in the opening (31; 131) and coupling the one-side sliding portion (52A; 152A) and the other-side sliding portion (52B; 152B) characterized in that: the plate (30; 130) is a metal plate (30; 130) made of a metal plate material as a base material; and in that: a clearance is formed between the coupling portion (52C; 152C) and the inner surface of the opening (31; 131) facing the coupling portion (52C; 152C) in a state where the molded connector housing (50; 150) is cooled to a normal temperature. a plate (30; 130) made of a plate material as a base material, formed with an opening (31; 131) penetrating in a plate thickness direction of the plate material and to be attached and fixed to the case of the device; a connector housing (50; 150) made of synthetic resin and fixed to the plate (30; 130), wherein the connector housing (50; 150) is fixed to the plate (30; 130) by molding; and at least one terminal fitting (10; 110) held in the connector housing (50; 150) while penetrating through the opening (31; 131); wherein: the connector housing (50; 150) includes a fixing portion (52; 152) which at least partly covers an opening edge portion of the opening (31; 131) while exposing an outer peripheral edge portion of the plate (30; 130); and the fixing portion (52; 152) includes a one-side sliding portion (52A; 152A) slidable relative to one surface side of the plate (30; 130), an other-side sliding portion (52B; 152B) slidable relative to the other surface side of the plate (30; 130) and a coupling portion (52C; 152C) substantially arranged in the opening (31; 131) and coupling the one-side sliding portion (52A; 152A) and the other-side sliding portion (52B; 152B) characterized in that: the plate (30; 130) is a metal plate (30; 130) made of a metal plate material as a base material; and in that: a clearance is formed between the coupling portion (52C; 152C) and the inner surface of the opening (31; 131) facing the coupling portion (52C; 152C) in a state where the molded connector housing (50; 150) is cooled to a normal temperature. the connector housing (50; 150) includes a fixing portion (52; 152) which at least partly covers an opening edge portion of the opening (31; 131) while exposing an outer peripheral edge portion of the plate (30; 130); and the fixing portion (52; 152) includes a one-side sliding portion (52A; 152A) slidable relative to one surface side of the plate (30; 130), an other-side sliding portion (52B; 152B) slidable relative to the other surface side of the plate (30; 130) and a coupling portion (52C; 152C) substantially arranged in the opening (31; 131) and coupling the one-side sliding portion (52A; 152A) and the other-side sliding portion (52B; 152B) characterized in that: the plate (30; 130) is a metal plate (30; 130) made of a metal plate material as a base material; and in that: a clearance is formed between the coupling portion (52C; 152C) and the inner surface of the opening (31; 131) facing the coupling portion (52C; 152C) in a state where the molded connector housing (50; 150) is cooled to a normal temperature. the plate (30; 130) is a metal plate (30; 130) made of a metal plate material as a base material; and in that: a clearance is formed between the coupling portion (52C; 152C) and the inner surface of the opening (31; 131) facing the coupling portion (52C; 152C) in a state where the molded connector housing (50; 150) is cooled to a normal temperature. a clearance is formed between the coupling portion (52C; 152C) and the inner surface of the opening (31; 131) facing the coupling portion (52C; 152C) in a state where the molded connector housing (50; 150) is cooled to a normal temperature.