The invention relates to a breath training device which is designed for solving the technical problem that an existing similar product is not good enough in exhaling and inhaling structure design. The breath training device comprises a
bottle body, a corrugated hose and an air
nozzle; a cavity is formed in the
bottle body by connecting
bottle body shells on the two sides and a film at the bottom, an air hole of the bottle body is provided with an exhaling
assembly, and an inhaling
assembly is arranged in the bottle body. According to the technical scheme, the exhaling
assembly comprises a cover shell, a pointer, a cover plate, a one-way membrane and a seat shell; the one-way membrane is arranged in the seat shell located at the air hole of the bottle body, the pointer is arranged in a fan-shaped
air cavity window of the cover shell, an air inlet is formed at the communication position of the
air cavity window and the cover shell, and a swaying block is arranged under a positioning hole of the pointer; a main
air cavity and a side air cavity are formed in the bottle body, a
main channel of the main air cavity is communicated with the main air cavity and a main air hole located in the air hole of the bottle body, and a
piston valve is arranged in the main air cavity; a side channel of the side air cavity is communicated with the side air cavity and a side air hole located in the air hole of the bottle body, and a seal cone is arranged in the side air cavity. The breath training device is suitable for being used for
rehabilitation training.