A wall through fixture device for an object comprising a case with a flange, the flange being engaged with an outer face of a wall, the case being passed through a hole in the wall and a wall inner face engagement means held by the case, the wall inner face engagement means being driven so as to engage with an inner face of the wall, thereby fixing securely the case to the wall with sandwiching the wall by the flange of the case and the wall inner face engagement means, wherein the wall inner face engagement means comprises: a screw being rotatably supported to the case; a nut being held non-rotatably and being allowed to move along to a first direction becoming near and apart with respect to a face of the wall; a pair of latch members being held displaceably to the nut in a second direction along a face of the wall and being engaged with the inner face of the wall and; a resilient member for urging the latch members apart from the nut; wherein the screw is screwed into the nut so as to make the nut and the latch members move toward the inner face of the wall, thereby sandwiching the wall between the flange of the case and the latch members, characterized in that the nut is held in the case and each latch member comprises an engagement slant face for locking to an inner edge of the hole of the wall, and the engagement slant face allows the latch members to move toward the inner edge of the hole of the wall together with the nut with respect to screwing of the screw so as to fix an object to the wall together with the flange of the case, the pair of latch members being fixed temporarily by engaging the engagement slant faces with an under edge of the wall hole, the screw being screwed into the nut and the pair of latch members being displaced toward the wall in said first direction so as to be drawn toward the inner face of the wall, the latter being sandwiched between the flange of the case and the pair of latch members to fix an object to the wall. a screw being rotatably supported to the case; a nut being held non-rotatably and being allowed to move along to a first direction becoming near and apart with respect to a face of the wall; a pair of latch members being held displaceably to the nut in a second direction along a face of the wall and being engaged with the inner face of the wall and; a resilient member for urging the latch members apart from the nut; wherein the screw is screwed into the nut so as to make the nut and the latch members move toward the inner face of the wall, thereby sandwiching the wall between the flange of the case and the latch members, characterized in that the nut is held in the case and each latch member comprises an engagement slant face for locking to an inner edge of the hole of the wall, and the engagement slant face allows the latch members to move toward the inner edge of the hole of the wall together with the nut with respect to screwing of the screw so as to fix an object to the wall together with the flange of the case, the pair of latch members being fixed temporarily by engaging the engagement slant faces with an under edge of the wall hole, the screw being screwed into the nut and the pair of latch members being displaced toward the wall in said first direction so as to be drawn toward the inner face of the wall, the latter being sandwiched between the flange of the case and the pair of latch members to fix an object to the wall.