A first container (100, 300, 400) capable of being coupled horizontally and vertically at a time, the container (100, 300, 400) comprising: a main body (120, 320,420) having a receiving space defined therein and an opening; and a cover (110, 310, 410) covering the opening of the main body (120, 320, 420), wherein the main body (120, 320, 420) has a rib divided into at least two parts (123, 124,422, 423) and protruding along an edge portion of a lower surface thereof, and a groove portion (125, 325, 326, 425, 426, 427) defined between the at least two parts (123, 124) of the rib, the cover (110, 310, 410) has, in a surface thereof, at least two track-shaped coupling grooves (112, 113, 312, 313, 314, 412, 413, 414, 415) into which a rib of a main body (120, 320, 420) of another container (100, 300, 400) having the same shape as the rib of the main body (120, 320, 420) of the first container (100, 300, 400) is inserted, and wherein the coupling grooves are spaced apart from each other, and wherein the cover (110, 310, 410) has a track-shaped airtight groove defined in an edge portion of an opposite surface of the cover (110, 310, 410), wherein an edge of the opening of the main body (120, 320, 420) is inserted into the airtight groove, and wherein either a spaced portion defined between two track-shaped coupling grooves (112, 113, 312, 313, 314, 412, 413, 414, 415) of a cover (110, 310, 410) of another container (100, 300, 400, 500) having the same shape as the cover (110, 310, 410) of the first container (100, 300, 400), or adjacent edge portions of covers (110, 310, 410) of two different containers (100, 300, 400) which are disposed adjacent to each other, is or are inserted into the groove portion (125, 325, 326, 425, 426, 427) of the rib of the main body (120, 320, 420) of the first container (100, 300, 400). a main body (120, 320,420) having a receiving space defined therein and an opening; and a cover (110, 310, 410) covering the opening of the main body (120, 320, 420), wherein the main body (120, 320, 420) has a rib divided into at least two parts (123, 124,422, 423) and protruding along an edge portion of a lower surface thereof, and a groove portion (125, 325, 326, 425, 426, 427) defined between the at least two parts (123, 124) of the rib, the cover (110, 310, 410) has, in a surface thereof, at least two track-shaped coupling grooves (112, 113, 312, 313, 314, 412, 413, 414, 415) into which a rib of a main body (120, 320, 420) of another container (100, 300, 400) having the same shape as the rib of the main body (120, 320, 420) of the first container (100, 300, 400) is inserted, and wherein the coupling grooves are spaced apart from each other, and wherein the cover (110, 310, 410) has a track-shaped airtight groove defined in an edge portion of an opposite surface of the cover (110, 310, 410), wherein an edge of the opening of the main body (120, 320, 420) is inserted into the airtight groove, and wherein either a spaced portion defined between two track-shaped coupling grooves (112, 113, 312, 313, 314, 412, 413, 414, 415) of a cover (110, 310, 410) of another container (100, 300, 400, 500) having the same shape as the cover (110, 310, 410) of the first container (100, 300, 400), or adjacent edge portions of covers (110, 310, 410) of two different containers (100, 300, 400) which are disposed adjacent to each other, is or are inserted into the groove portion (125, 325, 326, 425, 426, 427) of the rib of the main body (120, 320, 420) of the first container (100, 300, 400).