A forehead abutting device for use with a respiratory mask without adjustment thereof is provided. The upper end of the respiratory mask extends upward to form a support portion. A forehead cushion component, which has a forehead cushion and is capable of protracting and retracting resiliently and automatically, is disposed at the upper end of the support portion. The forehead cushion component includes a forehead cushion and a pipe portion extending therefrom. The terminal end of the pipe portion abuts against a receiving hole portion disposed at the upper end of the support portion. A resilient element capable of pushing the forehead cushion component outwardly and resiliently is disposed inside the receiving hole portion. The mask is fixed at three points and accurately positioned, fits different forehead contours through the forehead cushion component, imposes less burden on the nasal bridge, and prevents gas leakage.
