A portable slide type cosmetic compact case in which a cosmetic product is placed, the portable slide type cosmetic compact case comprising: a case body having an upper plate with a cosmetic product accommodation part adapted to accommodate the cosmetic product therein, a lower plate facingly spaced apart from the upper plate, and a side peripheral wall for connecting the upper plate and the lower plate to each other and having a portion open thereon, the upper plate, the lower plate, and the side peripheral wall constituting a slide storage part; a brush unit serving as a brush to which the cosmetic product is applied and slidingly inserted and drawn into and from the slide storage part through the open portion of the side peripheral wall; and a cover coupled to the case body and covering the cosmetic product accommodation part on top of the upper plate, wherein the cover comprises: a cover plate facing the upper plate; a side peripheral surface extended downwardly from the periphery of the cover plate to cover the side peripheral wall of the case body; a hinge coupling part protruding downwardly from one side end of the side peripheral surface to be hinge-coupled to the case body; and a locking part protruding downwardly from the other side end of the side peripheral surface opposite to the hinge coupling part and covering the brush unit inserted into the slide storage part from outer side thereof to cover the brush unit exposed through the open portion, wherein the brush unit comprises: a handle part whose outer surface is covered with the locking part when the brush unit is inserted into the slide storage part; and a brush part coupled to the handle part and accommodated in the slide storage part, characterized in that, the handle part has a coupling groove formed concavely on the outer peripheral surface thereof toward the slide storage part, and the locking part of the cover is inserted into the coupling groove of the handle part from top thereof. a case body having an upper plate with a cosmetic product accommodation part adapted to accommodate the cosmetic product therein, a lower plate facingly spaced apart from the upper plate, and a side peripheral wall for connecting the upper plate and the lower plate to each other and having a portion open thereon, the upper plate, the lower plate, and the side peripheral wall constituting a slide storage part; a brush unit serving as a brush to which the cosmetic product is applied and slidingly inserted and drawn into and from the slide storage part through the open portion of the side peripheral wall; and a cover coupled to the case body and covering the cosmetic product accommodation part on top of the upper plate, wherein the cover comprises: a cover plate facing the upper plate; a side peripheral surface extended downwardly from the periphery of the cover plate to cover the side peripheral wall of the case body; a hinge coupling part protruding downwardly from one side end of the side peripheral surface to be hinge-coupled to the case body; and a locking part protruding downwardly from the other side end of the side peripheral surface opposite to the hinge coupling part and covering the brush unit inserted into the slide storage part from outer side thereof to cover the brush unit exposed through the open portion, wherein the brush unit comprises: a handle part whose outer surface is covered with the locking part when the brush unit is inserted into the slide storage part; and a brush part coupled to the handle part and accommodated in the slide storage part, characterized in that, the handle part has a coupling groove formed concavely on the outer peripheral surface thereof toward the slide storage part, and the locking part of the cover is inserted into the coupling groove of the handle part from top thereof. a cover plate facing the upper plate; a side peripheral surface extended downwardly from the periphery of the cover plate to cover the side peripheral wall of the case body; a hinge coupling part protruding downwardly from one side end of the side peripheral surface to be hinge-coupled to the case body; and a locking part protruding downwardly from the other side end of the side peripheral surface opposite to the hinge coupling part and covering the brush unit inserted into the slide storage part from outer side thereof to cover the brush unit exposed through the open portion, wherein the brush unit comprises: a handle part whose outer surface is covered with the locking part when the brush unit is inserted into the slide storage part; and a brush part coupled to the handle part and accommodated in the slide storage part, characterized in that, the handle part has a coupling groove formed concavely on the outer peripheral surface thereof toward the slide storage part, and the locking part of the cover is inserted into the coupling groove of the handle part from top thereof. a handle part whose outer surface is covered with the locking part when the brush unit is inserted into the slide storage part; and a brush part coupled to the handle part and accommodated in the slide storage part, characterized in that, the handle part has a coupling groove formed concavely on the outer peripheral surface thereof toward the slide storage part, and the locking part of the cover is inserted into the coupling groove of the handle part from top thereof.