An inflatable kite includes a main tube and a sub tube. The inflatable kite includes: a first air chamber, which constitutes the sub tube; a second air chamber, which constitutes the sub tube and which is disposed at a position that is farther from the main tube than from the first air chamber in the sub tube; and a pressure regulator configured to adjust a pressure of the first air chamber and a pressure of the second air chamber. The sub tube cut by one plane that crosses in the direction of extension of the sub tube has a maximal cross-sectional area on a cross section of the first air chamber. The pressure regulator regulates the pressure of the first air chamber to be lower than the pressure of the second air chamber in a steady flight of the inflatable kite.

An inflatable kite includes a main tube and a sub tube. The inflatable kite includes: a first air chamber, which constitutes the sub tube; a second air chamber, which constitutes the sub tube and which is disposed at a position that is farther from the main tube than from the first air chamber in the sub tube; and a pressure regulator configured to adjust a pressure of the first air chamber and a pressure of the second air chamber. The sub tube cut by one plane that crosses in the direction of extension of the sub tube has a maximal cross-sectional area on a cross section of the first air chamber. The pressure regulator regulates the pressure of the first air chamber to be lower than the pressure of the second air chamber in a steady flight of the inflatable kite.

An inflatable kite system with an internal support structure which allows the kite to be formed into any shape desired. Shapes can include sports team logos, cartoon characters, or any other desired shape. Custom text can be printed as well for advertisement purposes. Preferably, the body is formed from Mylar, also known as BoPET (Biaxially-oriented polyethylene terephthalate), or similar materials to allow for good inflation and structural stability. The kite would be formed of two shaped pieces sealed along their edges and then sealed in multiple patterns along the faces of the two shaped pieces to form internal structural tubes. When these internal structural tubes are inflated, they act as support structures for the kite similar to existing hard-formed kite frames which rely on plastic or wooden sticks. Additional channels for being inflated may also be formed to help the kite float.