An inflatable kayak comprising: a bottom tube formed in an air tube type configured such that an outer circumference thereof is open on both sides; a pair of side tubes provided on both sides of an upper surface of the bottom tube, and formed in an air tube type configured such that an outer circumference thereof is open on both sides; upper tapes provided along the outer circumference of the bottom tube so as to cover upper parts of both open sides of the bottom tube, each upper tape comprising an upper adhesive part formed at an upper end of the upper tape so as to be adhered along an upper surface of the bottom tube, and a first outer adhesive part configured to extend outwards from a lower end of the upper tape; lower tapes provided along the outer circumference of the bottom tube so as to cover lower parts of the open sides of the bottom tube, each lower tape comprising a lower adhesive part formed at a lower end of the lower tape so as to be adhered along a lower surface of the bottom tube, and a second outer adhesive part configured to extend outwards from an upper end of the lower tape such that an upper surface of the second outer adhesive part is adhered to a lower surface of the first outer adhesive part; and side tapes provided to cover both open sides of the side tubes, each side tape comprising a pair of side adhesive parts horizontally bent from an upper end and a lower end of each side tape so as to be adhered to an upper surface and a lower surface of a corresponding one of the side tubes along an outer side and an inner side of the corresponding one of the side tubes, wherein the side tubes are connected to the bottom tube by adhering upper surfaces of the first outer adhesive parts to outer surfaces of the side adhesive parts provided at the outer sides of the side tubes in a state in which the first outer adhesive parts and the second outer adhesive parts, adhered to each other, are bent upwards. a bottom tube formed in an air tube type configured such that an outer circumference thereof is open on both sides; a pair of side tubes provided on both sides of an upper surface of the bottom tube, and formed in an air tube type configured such that an outer circumference thereof is open on both sides; upper tapes provided along the outer circumference of the bottom tube so as to cover upper parts of both open sides of the bottom tube, each upper tape comprising an upper adhesive part formed at an upper end of the upper tape so as to be adhered along an upper surface of the bottom tube, and a first outer adhesive part configured to extend outwards from a lower end of the upper tape; lower tapes provided along the outer circumference of the bottom tube so as to cover lower parts of the open sides of the bottom tube, each lower tape comprising a lower adhesive part formed at a lower end of the lower tape so as to be adhered along a lower surface of the bottom tube, and a second outer adhesive part configured to extend outwards from an upper end of the lower tape such that an upper surface of the second outer adhesive part is adhered to a lower surface of the first outer adhesive part; and side tapes provided to cover both open sides of the side tubes, each side tape comprising a pair of side adhesive parts horizontally bent from an upper end and a lower end of each side tape so as to be adhered to an upper surface and a lower surface of a corresponding one of the side tubes along an outer side and an inner side of the corresponding one of the side tubes, wherein the side tubes are connected to the bottom tube by adhering upper surfaces of the first outer adhesive parts to outer surfaces of the side adhesive parts provided at the outer sides of the side tubes in a state in which the first outer adhesive parts and the second outer adhesive parts, adhered to each other, are bent upwards.