Sputum collecting device

The utility model relates to the technical field of medical instruments, and discloses a sputum collecting device which comprises a sputum collecting bottle with one closed end and a first bottle cap, a first thin film and a thin film cap pressing the first thin film are arranged on an opening of the sputum collecting bottle, and the first bottle cap is arranged on the thin film cap in a covering mode. A negative pressure tube and a sputum suction tube are fixedly arranged on the first bottle cap, one end of the negative pressure tube penetrates through the first bottle cap and the first thin film and extends into the sputum collection bottle, a second thin film is arranged on the periphery of the sputum suction tube and extends to the other end of the sputum suction tube from the side, away from the sputum collection bottle, of the first bottle cap, and first absorption cotton is arranged on the inner side face of each of the first thin film and the second thin film. According to the sputum collecting device