A gangway connection (30, 40, 50, 60, 70, 80, 90) comprising: an outer connection having first and second outer layers (110, 120), the first and second outer layers being spaced apart from each other and overlapping with each other; and an inner connection disposed inside of the outer connection, and having first and second inner layers (210,220), the first and second inner layers being spaced apart from each other and overlapping with each other, wherein a plurality of first U-shape cross-sections is connected with each other in the first outer layer, and a central portion of each of the first U-shape cross-sections is protruded outwardly, wherein a plurality of second U-shape cross-sections is connected with each other in the second outer layer, and a central portion of each of the second U-shape cross-sections is protruded outwardly, wherein a plurality of third U-shape cross-sections is connected with each other in the first inner layer, and a central portion of each of the third U-shape cross-sections is protruded inwardly, wherein a plurality of fourth U-shape cross-sections is connected with each other in the second inner layer, and a central portion of each of the fourth U-shape cross-sections is protruded inwardly, wherein an end of the first U-shape cross-section makes contact with and overlaps with an end of the second U-shape cross-section, to form a first hole between the first and second U-shape cross-sections, wherein an end of the third U-shape cross-section makes contact with and overlaps with an end of the fourth U-shape cross-section, to form a second hole between the third and fourth U-shape cross-sections, wherein a size of the first hole is smaller than that of the second hole, wherein the outer connection and the inner connection are spaced apart from each other, the end of the first U-shape cross-section and the end of the third U-shape cross-section are spaced apart from each other, and the end of the second U-shape cross-section and the end of the fourth U-shape cross-section are spaced apart from each other, so that an air flow space (300, 301, 305, 306, 307, 308) where an air flows is formed. an outer connection having first and second outer layers (110, 120), the first and second outer layers being spaced apart from each other and overlapping with each other; and an inner connection disposed inside of the outer connection, and having first and second inner layers (210,220), the first and second inner layers being spaced apart from each other and overlapping with each other, wherein a plurality of first U-shape cross-sections is connected with each other in the first outer layer, and a central portion of each of the first U-shape cross-sections is protruded outwardly, wherein a plurality of second U-shape cross-sections is connected with each other in the second outer layer, and a central portion of each of the second U-shape cross-sections is protruded outwardly, wherein a plurality of third U-shape cross-sections is connected with each other in the first inner layer, and a central portion of each of the third U-shape cross-sections is protruded inwardly, wherein a plurality of fourth U-shape cross-sections is connected with each other in the second inner layer, and a central portion of each of the fourth U-shape cross-sections is protruded inwardly, wherein an end of the first U-shape cross-section makes contact with and overlaps with an end of the second U-shape cross-section, to form a first hole between the first and second U-shape cross-sections, wherein an end of the third U-shape cross-section makes contact with and overlaps with an end of the fourth U-shape cross-section, to form a second hole between the third and fourth U-shape cross-sections, wherein a size of the first hole is smaller than that of the second hole, wherein the outer connection and the inner connection are spaced apart from each other, the end of the first U-shape cross-section and the end of the third U-shape cross-section are spaced apart from each other, and the end of the second U-shape cross-section and the end of the fourth U-shape cross-section are spaced apart from each other, so that an air flow space (300, 301, 305, 306, 307, 308) where an air flows is formed.