The present invention relates to a hood opening and closing apparatus for an automobile, in which a rack gear installed in a plate of a hood lower support and teeth formed on a support bar are fixed to be fixed to each other, thereby facilitating opening and closing of the hood.;The support bar is connected to a lower support coupled to the lower bracket, and the support bar is connected to the support bar, In the hood hinge configured to be movable up and down,;A rack gear provided on the side surface of the upper support so as to be operated laterally by an elastic member in the plate, and a rack formed on one end of the support bar, and an operating groove is formed at one end of the rack gear And a fixing protrusion which is resiliently urged by an elastic member is formed in the operating groove, and the fixing protrusion is inserted and fixed in a fixing groove formed in a wall surface of the plate.
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